By Josh Maurer & Will Flemming

Clayton Mortensen couldn’t have pitched much better for the Red Sox over his three appearances. The right-hander allowed just one run over 9 1/3 innings while striking out 12. He never walked a batter and on two separate occasions worked three scoreless innings.

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The Red Sox mark Clayton’s fourth parent club: Oakland, St. Louis, and Colorado are the others. Few minor leaguers are able to make it to the big leagues with one team — Mortensen has now done it with all four.

“My case is pretty rare, I guess you can say,” Mortensen told me in the PawSox dugout. “I do take pride in the fact that I’ve gotten up with all four teams. I feel like each year I’ve gone out and competed.”

The Gonzaga product has now appeared in 27 major league games over four years, but never before had he pitched at Fenway Park.

“I wasn’t as star-struck as I thought I was going to be. I just thought it was a really cool atmosphere,” he told me.

“Being in the bullpen, you soak it in for a few innings. You have that huge addreneline rush that hits you once you get in the game. Then, after that, you don’t really notice anything else going on.”

Mortensen proved he can get it done at the major league level, but for now is back here in Pawtucket and adds to an already solid bullpen.

Tonight Daisuke Matsuzaka makes his second rehab start of the homestand for the PawSox. First pitch from McCoy is set for 6:05, we hit the air at 5:50 with the pre-game show.

Talk with you then.

-AG

@aaronmgoldsmith

agoldsmith@pawsox.com