I'm going to cheat a little and compare 2011 NL baserunning averages to Fielder's career totals. http://www.baseball-reference.com/players/f/fieldpr01-bat.shtml http://www.baseball-reference.com/leagues/NL/2011-baserunning-batting.shtml Runner is on 1st, single hit Fielder (249 total) 221 second 23 third 5 out 2011 NL average (per 249) 173 second 73 third 3 out Fielder net total: -50 thirds, + 2 outs Runner is on 1st, double hit Fielder (77 total) 54 third 21 home 2 out 2011 NL average (per 77) 42 third 33 home 2 out Fielder net total: -12 homes Runner is on 2nd, single hit Fielder (109 total) 61 third 42 home 6 out 2011 NL average (per 109) 40 third 65 home 4 out Fielder net total: -23 homes, +2 outs Fielder combined net: -50 thirds, -35 homes, +4 outs Fielder average per 162: -8 thirds, -6 homes, +1 out Using some very rough estimates of the cost of a failure to advance each base based on Run Expectancy charts, I get 8(0.18) + 6(0.5) + 1(0.6) = 5 runs per year. Throw in other baserunning situations for another run per year. Yeah, seems very plausible to me.