The Best and Worst Baserunners in 2014

We are in the middle of a very exciting year of baserunning. Last season, Jacoby Ellsbury was the only player with at least 50 stolen bases for the season (he had 52). This season, Dee Gordon (43), Jose Altuve (41), and Billy Hamilton (38) are on pace to easily fly by his total.

Bill James created a comprehensive statistic to measure baserunning called Net Gain that includes both stolen bases and advancements on hits and outs. Gordon and Altuve are both in the top five of the Net Gain leaderboard, but another player sits in the top spot:

Ben Revere is actually fourth in baseball with 26 steals this season. That total is significantly lower than the three players in front of him, but Revere stands out in other aspects of baserunning. Specifically, he has taken an extra base in 18 of his 31 opportunities, 13th-best among players with at least 30 opportunities. Meanwhile Revere has only been thrown out once in those situations on the basepaths, which is another key element that Net Gain measures. Gordon and Altuve have been thrown out on advancement opportunities four and three times, respectively.

Billy Hamilton falls short of the top five with +23 Net Gain, which is actually 11th in baseball. Last season, Hamilton seemed uncatchable with just 1 caught stealing against 13 stolen bases. This year, he has been caught 15 times against just 38 stolen bases. That 72 percent success rate is actually lower than the league rate of 73 percent.

Meanwhile, here are the worst baserunners in Net Gain so far this season:

Collectively, these five runners have a surprising seven stolen bases this season. Pujols leads the way with four of them. However, they also have been caught nine times. In addition, they have all struggled in advancement situations. In particular, Butler (6 percent) and Martinez (12 percent) have abysmal advancement rates.

Phillips is the most surprising name on the list, but his baserunning decline started in 2013. In 2012, Phillips had +20 Net Gain with 15 steals and just one baserunning out. Last season, he declined to +6 Net Gain, five steals, and six baserunning outs. Meanwhile, he already has six baserunning outs at the halfway point this season and only one steal to his credit.