OAKLAND — Jarrod Parker's scheduled start today is being pushed back to Saturday and right-hander Dan Straily will be called up to take his place on the mound.
Parker left his start Saturday in the fourth inning after falling to the ground because of tightness in his right hamstring.
A's manager Bob Melvin said Parker was "still feeling it a little bit" when he threw a bullpen session at the O.Co Coliseum on Tuesday.
"Last night, we went home and felt like the best thing to do would be to just push him back a couple of days and make sure," Melvin said.
Straily, who was scheduled to start for Triple-A Sacramento on Wednesday, will rejoin the club on today and pitch the final game of the A's series against the Chicago Cubs.
The 24-year-old started 12 games for the A's this year, posting a 4-2 record and a 5.00 ERA before being sent down to Sacramento on June 23.
In his one start with the River Cats on June 28, Straily tossed six innings, surrendering two earned runs on nine hits.
Pitcher of the Month: Ageless wonder Bartolo Colon earned American League Pitcher of the Month honors for June after going a perfect 5-0 with a 1.75 ERA. In doing so, Colon snagged the fourth Pitcher of the Month award of his 15-year career and his first since August 2005, the year he won the AL Cy Young Award.
"He probably won't act like it's that big of deal, but I do — I think it's a big deal," Melvin said.
The 40-year-old Colon entered Wednesday's start against the Cubs 11-2 on the year with a 2.79 ERA. On Friday, he became the first A's pitcher since Barry Zito in 2005 to win eight consecutive starts when he knocked off the St. Louis Cardinals at the Coliseum.
NEXT GAMEA's vs. Cubs
WHEN: Today, 1:05 p.m.
WHERE: O.co Coliseum
TV: CSN California
TV: KGMZ (95.7 FM)