Wily is going to be Trot's platoon partner, Mohr is out of a job now since that was going to be his main role. Wily hit .291 against lefties in 2005, Theo of course jumped at that. I still see Stern staying up here as the 5th OF for the first 17 days then being sent back down to Pawtucket.
Theo also expressed that Wily could spell Coco & Manny sometimes in their positions. Take some DH, while Ortiz plays 1st base some more possibly. They might even try him at 1st base as well, a position he hasnt played in the majors before.
But as I said, first & foremost, his main role entering the season will be Trot's platoon partner.
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EDIT: I was curious to see what Wily's stats were for this spring training. But then I realized, he's just coming back from the WBC. Very cool, he's going to be reunited with WBC team mate Big Papi