OBP is generally better than BA in measuring a player's value to his team's offense because it tells you exactly how frequently said player, well, gets on base. And Bill James is down with OBP, so you know it's cool.

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But if you're drafting for an OBP league, you're going to have to significantly adjust the rankings you find on most fantasy sites tailored to traditional 5x5 leagues. To help get you started, here are five guys who are much more valuable in OBP leagues than BA leagues. Fantasy Source members can also check out our 2014 stat projections, which include OBP:

Shin-Soo Choo, OF, Rangers. Choo was one of seven players with an OBP over .400 last year (Miguel Cabrera, Joey Votto, Mike Trout, Andrew McCutchen, Joe Mauer, Paul Goldschmidt). All these guys are plenty valuable in any format, but give some extra credit to Choo, whose 138-point difference between his .285 average and .423 OBP was the highest in MLB.

Giancarlo Stanton, OF, Marlins. Amidst the batting average woes (.249) last year, Stanton still managed to post a career-high .365 OBP with teams pitching around him whenever possible. Expect more of the same in 2014.

Carlos Santana, C/1B/3B?, Indians. No one’s mistaking Santana, a career .254 hitter, for Mauer in standard formats, but his career .367 OBP is significantly higher and steadily improving. He’s also improved his average in each of the last two seasons, which is more good news for his OBP upside.

Mike Napoli, 1B, Red Sox. Don’t worry about the wild swings in batting average for Napoli, who has a career .357 OBP with a personal-best .414 in 2011. His OBP last year was more than 100 points higher than his batting average.

Jose Bautista/Edwin Encarnacion, Blue Jays. Neither of these guys can be counted on for a high average, but both consistently post OBPs well above those underwhelming averages. Last season, Bautista’s and Encarnacion’s OBPs were 99 points and 98 points higher than their averages, respectively. Oh, and both guys consistently mash when healthy.