In response to TrotterNixon's comment:
he s a bonfide number one starter in this league of few
He's a bone fide 2nd rate starter, whether some incompetent pays market for him or not. He has high miles and has made a career of pitching in the losers bracket in the AL Central, NL Central and AL West.
The Red Sox already have 3 expensive 2nd rate starters in Lester, Buchholz and Lackey. They don't need another one with mental problems, high miles and without what it takes to pitch 1st rate in the AL East.
As a matter of fact Grienke does not have the average miles on his arm since he missed a whole season do to anxiety. Lester and Buchholz are extremely cheap both signing team friendly deals. One more thing your definition of second rate pitcher does not really seem like it means anything.