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After acquiring Yonder Alonso from the Reds along with three other players in the deal that sent Mat Latos out of San Diego, the Padres had two of the game's top first-base prospects in Alonso and Anthony Rizzo.
Rizzo became trade bait, and he was sent to the rebuilding Cubs for starter/reliever Andrew Cashner, a hard-throwing right-hander who missed much of 2011 with arm problems.
After roughly three months of demolishing Triple-A pitching to the tune of .342 BA, 23 HR, 62 RBI, Rizzo made his Cubs debut and showed all the makings of a future impact run-producer.
Over 337 big league at-bats, he hit .285 BA, 15 HR, 48 RBI. Ideally, he'll man first base and bat cleanup in Chicago for the next decade.
Meanwhile, Cashner was limited to just 46.1 innings of work, making five starts, 28 relief appearances and multiple trips to the DL.
He's off to a roaring start next season, too, as he's expected to miss the start of the season after injuring the thumb on his throwing hand in a hunting accident (h/t ESPN).
Trading Rizzo wasn't a bad idea, seeing as Alonso looks to have a bright future as well, but there is no question the Padres should have been able to get substantially more in return.