Markakis is believed to have suffered the initial injury on a slide more than a week ago, and he felt something "tweak" again in his final at-bat in Tuesday's game in Toronto.
A broken hamate bone is a fairly common baseball injury, and X-rays typically don't pick it up -- which explains why Markakis' X-rays on Wednesday were negative. He was examined in Sarasota by specialist Dr. John Hand on Thursday afternoon. The procedure is brief and typically under 20 minutes with an estimated recovery timetable of from 2-4 weeks. It's relatively good news for the Orioles, who were fearful Markakis -- their most durable player -- would be out for the rest of the season.
"If you had told me that was what it was going to be, I would have signed up for it in blood," Orioles manager Buck Showalter said Thursday afternoon. "It's not that bad."
Still, it will require a trip to the disabled list for Markakis, who was placed on the 15-day list Friday for the first in his Major League career. A hard-nosed player who prides himself on being in the lineup every day, Markakis had started the team's first 50 games, 48 in right field, before sitting out Wednesday's series finale in Toronto. The 28-year-old Markakis made significant strides in his recovery from offseason abdominal surgery and the Orioles remain hopeful he will bounce back from Friday's scheduled surgery in similarly quick fashion.
Markakis has played in at least 160 regular-season games in each of the past three seasons, a streak that will end with this injury. He is batting .256 with eight homers, 26 RBIs and a .785 OPS.
The Orioles purchased the contract of infielder-outfielder Bill Hall from Triple-A Norfolk to fill Markakis' roster spot. It will be Hall's second stint with the Orioles this season. He batted .286/.545/.714 in a six-game stint from May 12-25 and became the 22nd Oriole in club history to hit a home run in his first game with the team. Hall batted .221/.272/.372 with three home runs and 10 RBIs in 21 games over two stints with Triple-A Norfolk.
Markakis joins a crowded DL that includes relievers Matt Lindstrom and Stu Pomeranz, outfielder Nolan Reimold, catcher Taylor Teagarden and starting pitcher Tsuyoshi Wada, who will be out the entire season with Tommy John surgery on his left elbow. Of the group, Lindstrom is the closest to a return, according to Showalter. Brian Roberts and Zach Britton are also on the DL and on rehab assignments.
Brittany Ghiroli is a reporter for MLB.com. Read her blog, Britt's Bird Watch, and follow her on Twitter @britt_ghiroli. This story was not subject to the approval of Major League Baseball or its clubs.