In baseball statistics, on-base percentage (OBP; sometimes referred to as on-base average/OBA, as the statistic is rarely presented as a true percentage) is a statistic generally measuring how frequently a batter reaches base.[1] Specifically, it records the ratio of the batter's times-on-base (TOB) (the sum of hits, walks, and times hit by pitch) to their number of plate appearances.[1] It first became an official MLB statistic in 1984.
Here at Red Reporter, some of us are more interested in statistics than others, but we've all been known to use these newer metrics. Unfortunately, we don't always take the time to explain the figures. I know that I'm frequently guilty of inserting statistics without providing an adequate illustration of their meaning. In an effort to provide context to these figures and their use, we've decided to roll out a new series of posts exploring these new metrics. We will start with the simpler statistics and work our way to others from there. You won't need a statistics or mathematics degree to understand these posts, and best of all, we'll have fun. I promise.
Some fantasy scoring systems count on-base percentage in lieu of batting average. But regardless of a league's offensive-rate stat of choice, OBP tends to correlate with runs scored. And because Major League front offices value OBP highly, low-average hitters often receive their ample share of playing time -- and, thus, opportunities to accumulate fantasy counting stats -- as long as they walk enough to post satisfactory OBPs.
In Part 1, we'll take a look at the method to the madness of on base percentage (OBP) and slugging percentage (SLG) and see if we can give them their due respect on the scale of importance. In part 2, we'll explore why wOBA is a better stat to use than OPS and produce a scale so we can easily see what wOBA is above or below average and how the Tigers' players fit in.
While we haven’t seen the sport’s top hitters blasting home runs at record pace, as Barry Bonds, Sammy Sosa and Mark McGwire did at the height of the steroid era, we are seeing a significant rise in the power numbers of players in the 20-home run range. The result is a plethora of players who are capable of providing a club with power at the plate, giving general managers more options to add home run hitters to their lineup than ever before.
The only reason Carter's swinging strike rate isn't the highest in the league is that he's a relatively patient guy who sees a lot of pitches, otherwise he'd have the clean sweep. Although Chris Carter's actual career batting average is not unfathomably low at .220, it's pretty clear that his ability to make contact is the worst around. Additionally, Carter may have enjoyed more than his fair share of luck on balls in play because his career.294 BABIP seems a little steep for a guy with a batted ball profile like the one shown below:

Phase 1 of the swing is by far and away the most important phase. It is at this point where the hitter will either be all they can be or something less than that.  Not to say you can’t still get a “hit” but as we say all the time, “your worst mistake is your first mistake”. This basically means, when you make mistakes early in the swing(phase 1), 100 percent swing efficiency can not be reached.  Here is where early in the swing resides and where  the effortless swing can be achieved. In Phase 1, there are two main objectives.
Runs batted in (RBI): It's one of the most familiar and comfortable offensive stats around, and it's still got plenty of advocates. It's one of my least favorites, not only because of its native weaknesses but also because of its outsized importance when it comes to awards, bar-stool debates and the like. The primary problem with RBI is that it's highly, highly team-dependent. After all, it's hard to drive in many runs unless runners are getting on base in front of you, and that's not something you can control. Additionally, it's highly dependent upon your spot in the lineup. Take the exact same two hitters, put one in the leadoff spot and one at clean-up and you're going to get vastly different RBI totals. Like any traditional counting stat it's useful at the margins (e.g., it's hard to drive in 130 runs and somehow suck, but it's entirely possible to plate 100 runs and not be a useful player). Mostly, if you feel compelled to pay attention to RBI, don't do so without also paying attention to RBI percentage, or the percentage of runners than a batter plated. You can't consider RBI without also considering opportunities for RBI. - Perry
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LD% – This stands for line drive percentage, which is the percentage of balls a player hits that end up as line drives. As you might imagine, line drives are harder to field than any other type of batted ball, so you can expect them to fall for hits much more often. The league average on liners last year was .690, which means that you can expect a line drive to fall for a hit roughly 69% of the time. It makes perfect sense, then, that the more line drives a player hits, the higher you can expect their BABIP to be. This is supported when you compare the BABIP of players with a LD% above-league average (.313) to their counterparts with a below-league average mark (.297).
Should your head stay perfectly still on the backswing? Actually, it should move a little to the right. This is not a conscious thing. If the shoulders turn behind the ball, as they should, the head swivels and shifts slightly to the right (right). A lot of golfers try to keep their head frozen in place, and that can be a killer. It causes tension, blocks the front shoulder from turning back, and promotes a reverse pivot (see main tip). So let your head move naturally as you swing to the top.
Getting on base is an important skill, so you want to use OBP to determine if the player in question is a good offensive performer. However, OBP can only take you so far and it should only be used in the context of other statistics because OBP weights every time you reach base equally, whether you hit a home run or an infield single. If used in conjunction with slugging percentage or isolated slugging percentage, OBP is a very useful tool. In general, something like wOBA or wRC+ will tell a more accurate story, but if you’re looking for something extremely simple OBP is a much better bet than batting average.
Every hitter is entitled to their own style or preference when it comes to stance, set-up, and load. However, when the stride foots lands, all hitters are very much alike in their movements to and through contact. My emphasis will focus on the “non-negotiable” of consistent, hard contact—bat path. Learning to control the bat barrel is an enormous step forward in becoming the best hitter they can be.
In baseball statistics, on-base percentage (OBP; sometimes referred to as on-base average/OBA, as the statistic is rarely presented as a true percentage) is a statistic generally measuring how frequently a batter reaches base.[1] Specifically, it records the ratio of the batter's times-on-base (TOB) (the sum of hits, walks, and times hit by pitch) to their number of plate appearances.[1] It first became an official MLB statistic in 1984.

#### Another very common stat used to measure plate discipline is a player’s walk-to-strikeout-rate (or BB/K). This is again a fairly straight forward stat, and it is measured simply by dividing a player’s walk total into their strikeout total. The result gives you the average number of times a player walks between each strikeout. So if a player had a BB/K of an even 1.00, that would mean that they walked just as often as they struck-out (which is exceptionally good plate discipline).

Adjusted OPS-plus (OPS+): You might be familiar with OPS, which is simply on-base percentage added to slugging percentage (forget, for the moment, that they have different denominators). OPS+ is simply OPS adjusted for park and league conditions. It's scaled to 100, which means that 100 indicates a league-average OPS adjusted for park and league. An OPS+ of 110, for instance, is an OPS that's 10 percent better than the league average. On the other end, an OPS+ of 85 is one that's 15 percent worse than the league average. It's useful in that you can make a thumbnail comparison between, say, a hitter in Coors Field in 2000 to one in Dodger Stadium in 1968. It helps correct for the two things that most often corrupt unadjusted stats -- home parks and eras -- and it leans on the the two most important things a hitter can do -- get on base and hit for power. - Dayn Perry
Josh Donaldson hit .255 and scored 93 runs; think some of those 76 walks helped him out?  Brandon Moss was the man to own in the first half even with a .268 BA, but was dropped like a rock in the second half where he hit .173.  His OBP slipped from .349 down to .310, but at least he was still playable thanks in part to 14.8% walk rate.  Adam Dun hit .219 in 2013 and while he hit 34, owners cursed him.  Forget the 76 walks and .320 OBP though, it doesn’t count in fantasy.  In 2012 Dunn hit 41 home runs and scored 87 times, but a .204 batting average had him on America’s most hated list.  Using OBP you could have had .333 thanks in part to his 105 walks which batting average didn’t take into consideration.  Dunn’s value in 2012 using OBP was slightly above Adam Jones and his 34 walks.  Dunn had 71 more walks and Jones had 76 more hits, similar results but Jones is rewarded for being on base an equal amount of times.
Moving a single group of muscles may require the interaction of numerous nerve cells and involve multiple synaptic delays, as the body receives sensory information (sees the ball), processes it (makes a decision), and coordinates muscle action (swings the bat). Practice eliminates wasted time by speeding up the decision-making -- somehow the obvious mistakes and fruitless actions a novice spends time thinking about are simply ignored by the practiced player, and his brain saves the time needed to consider them. But basic reaction time due to nerve conduction and synaptic delay remains an irreducible constant of the game.
While all those stats can be very helpful individually, using them all to establish a batted ball profile will help you to get a solid idea of what a player’s hitting skill set really is. For the most part, a player with a solid LD% and IFH% can be expected to put up an above-average BABIP, while a player with a large FB% and IFFB% can be expected to post a below-average mark. With that framework in mind, let’s look at a quick example from the 2014 season:
The key to hitting a baseball with power is staying connected to the body's rotational energy. Body rotation is powered by the larger and more powerful muscles of the legs, hips and torso. For a batter to hit the ball with maximum power, his swing mechanics must stay connected and make efficient use of these larger muscle groups. This article discusses the important steps needed to produce a swing that transfers the body's rotational power into hitting power.
Doug you’ve done a great job putting this all together. I’m a former minor leaguer and now a hitting instructor at the Hudson Baseball Center in NJ and couldn’t agree with you more on your hitting technique. It’s tough to find people that haven’t played at a high level to understand that swinging down doesn’t mean ground balls all the time and that it does create backspin on the baseball. Even when I demo it for them its hard for them to believe but having you share the same info really helps. I’ve shared your page with some of my friends that have played in the minors and they also agree. Thanks, I’ll be following your page.
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On-base percentage, or OBP, measures the frequency with which a batter reaches base. OBP is expressed as a decimal rounded to three places, as in .300. Thus, OBP looks like batting average. However, instead of expressing the number of hits per at-bat, OBP represents the number of times on base per opportunity. The formula is simple, and one needs just five basic counting statistics to calculate OBP. These five stats are hits, walks, hit-by-pitch, at-bats, and sacrifice flies. The formula is:
The conclusion of the GIIB article shows that team gOBP has a correlation coefficient of 0.95 with R/G, a slight but meaningful improvement over the correlation coefficient of 0.93 between team OBP and R/G. This first test is straightforward: using Retrosheet, I collected team R/G, OBP, and gOBP for all 1,482 team seasons dating back to 1955. I then fit a linear model to these data and computed the correlation coefficients for each pairing. The results are below.
When a hitter puts the ball in play, the major league average to get a hit is only slightly above .300.  The upper tier of hitters can average around .340, which is how they manage to consistently hit above .300 year in and year out.  What this number means is that a ball hit in fair territory (many swings do not hit the ball fair) has nearly a 70% chance of being an out.  This is where the walk comes into play.  Hitters who are patient enough to work counts and take pitches are much more susceptible to walks than those who chase every first pitch.  The odds of reaching base after taking 4 balls is obviously 100%.  Essentially, hitters must be lucky in order to get a hit, while drawing a walk guarantees them to reach base.  This is why the walk is such a vital part of baseball overlooked by many.
In cricket, a player's batting average is the total number of runs they have scored divided by the number of times they have been out. Since the number of runs a player scores and how often they get out are primarily measures of their own playing ability, and largely independent of their teammates, batting average is a good metric for an individual player's skill as a batter.