cool it, guys, he's just getting his velocity back. for all we know, he's still getting the hang of pitching again. (last season was too short for him). i'd rather he take it slow rather than blow his elbow again. he'll come around, you'll see.
Now there's a question - in fact, do guys who've had Tommy John surgery re-blow the elbow very often? I can't think of any cases right off the top of my head - and the ligament that is put in place is larger and stronger (which is supposedly why guys occaionally get stronger and better velocity a few years down the road).
It shouldn't matter with Mantei anyhow - he is 2 years out, fully recovered, his velocity is back to normal - as high as 98mph. He was rusty from disuse yesterday and historically does poorly after a long layoff - but he also ALWAYS has given us anxiety attacks when closing.
i suppose it's because he never really had good control of his fastball. well, if it's any consolation, he did say that tommy john forced him to be more of a pitcher (i.e. actually locate that darn fastball). i hope that means he's better than he ever was.