Well, I guess we got our answer as to who the odd man out is.
The Cubs had reached an agreement with right-hander Carlos Villanueva a month ago, several days before even the Christmas holiday. But the 40-man roster was at its limit and in order to add the 29-year-old veteran, somebody had to go.
Lendy Castillo was designated for assignment Saturday as Villanueva's signing finally became official.
Castillo began his career as a shortstop in the Phillies organization, but converted to a pitcher in 2010 and showed enough promise for the Cubs to select him in the 2011 Rule 5 draft.
The 23-year-old appeared in 13 games for the big-league club last season, suffering through a 7.88 ERA and 2.25 WHIP in 16 innings.
Castillo went on the disabled list May 11 with a groin strain and missed several months before being recalled in mid August. He had never pitched above the Single-A level before 2012.
By placing him on waivers, the Cubs risk losing Castillo to another team, but it has cleared room for Villanueva, whose flexibility will come in handy on this year's team. The former Blue Jay and Brewer has made 56 starts in his MLB career and 245 relief appearances, with a 4.26 ERA and 1.30 WHIP.
The Cubs still need to free up another spot on the 40-man roster for new acquisition Scott Hairston, assuming the reported deal goes through without a hitch.