Two-thirds of the way through spring training, catcher Jarrod Saltalamacchia marveled at how Clay Buchholz appeared to be throwing without any inhibitions after missing the final three months of last season with a broken back.

And now?

Buchholz is mired in the worst six-start stretch for any Red Sox starting pitcher in 87 years, and, according to pitching coach Bob McClure, the right-hander might be thinking too much about his back.