Britton is expected to throw about 80 pitches in his Monday start. He last appeared on Tuesday, throwing 47 pitches in four scoreless innings against Boston Minor Leaguers before adding another 20 pitches in the bullpen. A strong outing on Monday would put him on track to begin a rehab stint later in the week.
"We've looked at the schedule, we know exactly where he'd go if things go well Monday," Showalter said. "But we'll see."
Showalter said Britton has performed better and improved his velocity with each outing.
"The whole key is when he comes out of there, he's prepared to go 90 to 100 pitches when he gets to an affiliate," Showalter said.
Following the normal rotation, Britton would have been scheduled to throw on Sunday, but he was pushed back since there are no extended spring games on Sundays. The O's could have used him in a simulated game or intrasquad game, but chose to instead push him back to Monday so he could face real competition.
"The look in his eyes, his demeanor and everything is upbeat the last 10 days," Showalter said. "He's excited about where he is."
Showalter said Mark Reynolds is doing well and is almost ready to resume baseball activities, adding that Reynolds is ahead of Endy Chavez, as both are in Sarasota, Fla., recovering from strained obliques that landed them on the 15-day disabled list. Showalter also set a timetable of "hopefully" two-to-three weeks for Matt Lindstrom to recover from the partial tear of a ligament in his right middle finger. Nolan Reimold's (herniated disc) status is still unclear, and the team has yet to determine whether he will undergo a second epidural.