ST. PETERSBURG, Fla.  —The Boston Red Sox have activated reliever Hideki Okajima from the 15-day disabled list and optioned right-hander Michael Bowden to Triple-A Pawtucket.

The moves were announced before Boston’s game Saturday night at Tampa Bay.

Okajima had been out since Aug. 6 due to a strained right hamstring.

RANGERS:  Texas placed right-hander Frank Francisco on the 15-day disabled list before Saturday’s game against Oakland.

Francisco left Friday’s 7-3 victory over the Athletics in the ninth inning when he aggravated a right rib-cage injury. Francisco was making his first appearance since last Saturday. He recently got a cortisone shot in his right armpit to deal with a strained muscle.

Francisco is 6-4 with a 3.76 ERA in 56 appearances for Texas this season, with a 2.13 ERA in 13 outings since the All-Star break.

YANKEES: A person with knowledge of the situation confirms that Major League Baseball is investigating New York pitcher Ivan Nova and a former minor league teammate for allegedly injecting each other with B-12 shots.

The person spoke to The Associated Press on condition of anonymity because MLB is not discussing the matter publicly.

The New York Post first reported the investigation Saturday, saying that baseball was looking into whether Nova and pitcher Wilkin De La Rosa injected each other last season while they were teammates with Double-A Trenton. B-12 is not on baseball’s list of banned substances, but the Post said MLB is focused on the issue of whether the players injected each other and wants to make certain the shots were in fact B-12.

WHITE SOX: Chicago placed reliever Erick Threets on the 15-day disabled list with a torn ligament in his left elbow.

BLUE JAYS: Third baseman Edwin Encarnacion sprained his left wrist swinging at a pitch Saturday and was placed on the 15-day disabled list after a 5-4 win over Detroit.

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