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Reds acquire Latos in five-player deal
Latos, 24, will join right-hander Johnny Cueto, 25, to give the Reds a young, dynamic 1-2 starting punch. The Reds will control Latos for four years; he is not eligible for arbitration until 2013.
Latos was 9-14 with a 3.47 ERA for the Padres last season after going 14-10 with a 2.92 ERA in 2010.
Volquez, 28, was 30-18 with a 4.17 ERA in 74 games for the Reds after arriving in December 2007 from the Texas Rangers as part of the Josh Hamilton trade. He was 17-6 with a 3.21 ERA in 2008 but fell to 5-7 with a 5.71 ERA last season.
Boxberger, 23, went 2-4 with 11 saves and a 2.03 ERA over 55 relief appearances last season in the Reds organization, splitting the year between Double-A Carolina and Triple-A Louisville.
Alonso, 24, hit .330 with five home runs and 15 RBI in 47 games for the Reds in 2011.
Grandal, 23, hit .305 with 14 home runs and 68 RBI in 105 minor-league games.
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