The one and only question that needs to be asked about Tulo is: can he stay healthy? There is no doubting his skills. When he is healthy and on the field, he is the best offensive SS in the game for fantasy baseball. The past 3 years he has failed to stay healthy for an entire season. In 2009, he played 151 games and had a stat line of 32 HR/20 SB while hitting .297. Then in 2010 he played in 122 games, then in '11 143 games, then last year in only 47 games.
Personally, I am buying Tulo this year. Many of his past injuries were fluky (EG slicing his hand open after he slammed his bat in frustration), but there is no doubt that when you are drafting in the first 3 rounds, you want stability. In reality though, every single pick is a gamble. I will be drafting Tulo with confidence (albeit possibly blind confidence
) as high as the 2nd round. He is similar to Gronk at TE in football. Having Gronk at TE is a matchup buster each and every week because there is no other TE that comes close to matching Gronk if he his healthy for 16 games. Similarly, if Tulo is healthy for 140-150 games, he can put up a 30+ HR/10+ SB .300 season. A feat that, arguably, no other SS will come close to.
However, for dynasty players, I think it would be prudent to keep in the back of your mind that Tulo's long term (~2 years from now) position is likely 1B. He is big for a SS, and he has proven that his legs take a beating playing the most grueling position on the field. In 2 years, barring trades and injuries, I think we will see a Rockies infield of 1B-Tulo, 2B-Rutledge, 3B-Arenado, and SS-Story. While Tulo is an elite top 10 overall player when healthy, his value would take a hit moving from SS to 1B. But again, that is not something re-drafters need to worry about or dynasty players need to worry about for another 2 years. However, it is still something to keep in mind.