He set the mark for the highest starters ERA in team history at 8.28, according to WEEI.com. The record comes with the qualifier of having to start at least 10 games in a given year.
His last start of 2012 ended with a line of 2⅓ innings against the New York Yankees, allowing five runs on six hits.
Matsuzaka will become a free agent after the 2012 season comes to a close, and it's doubtful he'll return after putting together a string of very sub-par campaigns.
Matsuzaka started his six-year, $52 million deal out with a couple of very good years, compiling a 33-15 record and a 3.72 ERA, including being a key part of the 2007 World Series team.
However, recent times haven't been so kind to the hurler. In the final four years of his contract, Matsuzaka finished with a sub-.500 record of 17-21 and a 5.53 ERA.