Tad bit of a head-scratcher, but Cotts has been performing well lately. I think part of the reasoning behind this move is to see what Cotts can offer this team. Eyre's contract is up at the end of the year and the Cubs' bullpen would benefit from having a capable left-hander in the bullpen over the long haul. If Cotts can't produce, then he's fodder and can be shipped off at the deadline.