Montas, 23, hit triple digits in mph during a two-inning outing in extended spring training on Thursday. In his only Major League stint last year, Montas was 0-2 with a 4.80 ERA in seven games, two of them starts, with 20 strikeouts, but nine walks in 15 innings.
"We're building up his pitch count to give us the flexibility to be a starter, but I assume he's coming out of the bullpen for us," said manager Dave Roberts. "I like hearing that he's hitting a hundred. A hundred's good. Throw a hundred with command, you can help a Major League club."
Meanwhile, pitcher Hyun-Jin Ryu was scheduled to make a second rehab start Friday night for Class A Advanced Rancho Cucamonga for three innings. Infielder Carlos Frias (oblique) will make a rehab start at Triple-A Oklahoma City on Sunday. Alex Guerrero (left knee) continues his rehab assignment at Tulsa. And outfielder Scott Van Slyke (lower back) is expected to begin a rehab assignment next week.
• In non-rehab news, Minor League pitcher Sebastian Martinez received a 72-game suspension without pay after testing positive for Stanozolol and Furosemide, performance-enhancing substances. The suspension of Martinez, who is on the roster of the Dominican Summer League Dodgers, will be effective at the start of the 2016 DSL season.
Ken Gurnick has covered the Dodgers for MLB.com since 2001. This story was not subject to the approval of Major League Baseball or its clubs.