Cuban lefthander Alexander Carreras, who turns 22 on Sunday, has signed with the Diamondbacks for $400,000.

At his best, Carreras has shown a solid delivery and athleticism, touched 93 mph and mixed in a hard cutter/slider, which some scouts believe is his best pitch. His velocity has been inconsistent, though, and some scouts said they saw him sitting around 86-89 mph. The 6-foot lefty also mixes in a breaking ball and a changeup.

Carreras had been training in the Dominican Republic with Edgar Mercedes over the last year and pitching in winter ball for Aguilas in the Dominican League, where in four starts he had a 4.20 ERA with 12 strikeouts and 10 walks in 15 innings.

According to Baseball America's records, Carreras played in Cuba for the Industriales in his final season (2009-2010) in Serie Nacional, where he had a 5.01 ERA in 70 innings with 46 strikeouts and 36 walks. During his rookie season in 2008-2009, Carreras played for the Guerreros de Metropolitanos and posted a 3.94 ERA in 48 innings with 33 strikeouts and 27 walks.

Given his Cuban track record, Carreras is expected to begin his career in the minor leagues, possibly Double-A Mobile or high Class A Visalia.