I think Ryan Madson of the Phillies would be nice (he's 6'6" too). He's in the majors - his first year.
11.2 innings, 11 K, 0.00 ERA, 0.69 WHIP
If any SP gets injured, he's next in line. He started the whole time in the minors, but he's doing middle relief now. He has some sick stuff, 4 scoreless innings against the Cards last night, only allowing one hit, and got the win.
He's looking infinitely better than Myers this year.