Looking at the chart below--looks like its about 16 errors with super advanced chart at 2B--though better range fielders will turn a few more DP.
http://www.baseballthinkfactory.org/btf ... dg.htm#topA 3e10 2B allows 27.7 OPS card chances per game, a 2e26 allows 27.8---if you have the strategy guide, add the OB and Total bases of a player (which gives OPS in card chances), subtract the fielding OPS allowed, to compare players.
The think factory ratings are good for the infield--but the OF ratings are off in my opinion, they are correct for 1 outfielders with any error rating, and across the top for 2 through 5 with no errors, but are worse than they should be for the 2 trough 5 guys with errors.