If the Jays are going to upgrade the starting rotation, and that's a big if, we are pretty much down to Ubaldo Jimenez and Ervin Santana...unless they want to take a flier on Suk-Min Yoon. With pitchers heading to Dunedin this week, if they are going to add, now is the time.
Diaz might be more interesting to the Jays:
Diaz, 23, has primarily been a shortstop in Cuba, but has generally received mixed reviews for his defense and may need to change positions. Scouts have raved about his potential to grow into a big bat, however. During the 2011-12 season -- his last before defecting -- Diaz hit .315/.404/.500 with 12 home runs.
We could use someone to play second base that has "potential to grow into a big bat".