Halladay decline key: cutter struggles

Roy Halladay's numbers have not been like anything we've seen from him in a long time: an 8.65 ERA, 4.5 walks and 2.4 home runs per nine innings.

The velocity on Halladay's fastball has declined this season, but the pitch that has suffered the most has actually been his cutter.

Sunday, Adeiny Hechavarria hit a bases-clearing triple off a Halladay cutter in the top of the first inning.

Roy Halladay Cutter
Last 4 Seasons

Halladay had thrown his cutter more often than his normal fastball in both 2011 and 2012, and it was an effective pitch for him.

This season, he has scaled the use of the pitch down, but hitters have done significant damage to it.

Halladay has allowed as many homers with his cutter this season (five) as he did all of last season.

For the season, opponents are hitting .433 and slugging 1.067 in at-bats ending with that pitch this season.

The image below shows the difference in performance for Halladay's cutter this season compared to the previous three seasons.