I would start Moose and Callaspo, but keep an eye on the lineups, and start Roberts when Callaspo is not in the lineup. I know people love Roberts, but he has sit twice in the last week, and...
Numbers in the last 30 days (this may not be your league's categories, but you can get the idea)
AB Avg OPS HR BI RN SB
Callaspo 96 271 712 1 11 7 1
Roberts 89 236 703 2 8 14 4
And Callaspo has a longer history of semi-production than Roberts has.
Help with mine: viewtopic.php?t=433023