The Orioles will be without left-hander Randy Wolf for the remainder of the season.
Wolf was placed on the 60-day disabled with a tear in the ulnar collateral ligament in his left elbow before Wednesday's game. The 36-year-old Wolf will likely need a second Tommy John surgery to pitch again.
The prognosis on Wolf, who was signed Aug. 31 to add left-handed bullpen depth, didn't appear to be promising Tuesday when manager Buck Showalter wouldn't discuss the results of an MRI performed that morning, only saying that Wolf would speak with team orthopedist Dr. John Wilckens and Dr. Lewis Yocum, who performed Tommy John surgery on Wolf's elbow in 2005.
"We'll see what Randy and the doctors want to do," Showalter said before Wednesday's game. "We'd like to have Randy, trust me."
Showalter said Wolf felt pain in his elbow in the final inning of his start Saturday in Boston. Wolf was making his second straight spot start, allowing three runs on six hits over five innings in the Orioles' 9-6, 12-inning win over the Red Sox.
The move allowed the Orioles to purchase utility man Bill Hall's contract and add him to the 40-man roster.
Hall was in the Orioles clubhouse before Wednesday's game after working out in instructional league in Sarasota, Fla., for a possible call-up.
Hall, 32, hit .222 with a .500 on-base percentage in 14 plate appearances through seven games. He played in seven games for the Orioles from May 12 to June 1. He hit .246 with a .300 on-base percentage and 15 homers in 90 games with Triple-A Norfolk this year.
"This team is in a playoff run," Hall said. "This is obviously going to be fun, especially the last week. I'm an able body if they need me to do whatever they need me to do. I want to help get this team into the playoffs."
Hall can add right-handed hitting outfield depth to accommodate outfielder Lew Ford's nagging groin soreness, which began following Sunday's series finale in Boston but had improved Wednesday, Showalter said.
Wolf was 2-0 with a 5.28 ERA in 15 1/3 innings over five appearances, including two starts, with the Orioles.