Born: November 1, 1988 in Itami, Hyogo, Japan (Age 25.206) Born: January 23, 1985 in Merrillville, IN (Age 29.123) 1213 professional innings in Japan for Tanaka 1042 professional innings for Shark Why wouldn't that matter to you? His arm has basically the same mileage. Because regardless of mileage, age is still a factor. He will no doubt be effective later than many pitchers are, but age will still catch up to him. I still say pay him, but you can't completely ignore the age. There's no way to try and predict whether more or less mileage with be a greater predictor of injury unless there's obvious gross abuse (look at friday night totals or Baker's tenure for that). I've always leaned towards caution before aggression. The thing to look at is regression/progression of velo and stuff thru K/9, BB/9, and HBP/9, HR/9 and H/9. As he develops a larger sample size, we can start to correlate numbers. Normal pitcher: K/9 start to regress at 25. BB/9 start to improve around 27-28 HR/9 start off very good regress to its lowest around 27 and gradually improve as pitchers get older. H/9 ratios generally remain flat with slight regression in the early 30s. Samardzija: K/9 peaked at 27 and has regressed the two seasons since. BB/9 ratio improved dramatically at 27 and has improved since, so he's been on par with that. HR/9 ratio has been his greatest improvement at 29. H/9 ratio has improved greatly at 29. The hope is that with the less tear on his arm that he can maintain where he's at for the duration of a 4 to 5 year contract, I think that's definitely possible. I think a greater fear should be whether or not, his HR/9 and H/9 ratios are sustainable even before considering the regression of stuff as he gets older. IMO, he's the perfect storm of lack of severe regression with velo (possibly due to lack of wear and tear/no previous injuries) and movement compared to most 29yos, the typical improvement of "pitchability" once someone gets to their prime, and unusually great and likely unsustainability of his HR/9 and H/9 ratios right now. My bigger fear would be buying someone who is unlikely to come close to maintaining their current run rather than a complete lemon. It's a matter of how much are you willing to overpay and accept a likely loss on $/production that likely gradually gets worse.