Manager Buck Showalter said the results revealed the elbow "looked good structurally."
"He lost some of the soreness," Orioles manager Buck Showalter told reporters before Monday's game, as the MRI was occurring. "The swelling is gone for the most part."
Wieters complained of right elbow soreness and was removed from Saturday's exhibition game against the Minnesota Twins after one inning. During that one inning behind the plate, Wieters threw high on a stolen-base attempt by Minnesota's Eduardo Nunez.
Showalter said X-rays were taken but no problem was revealed. On Sunday, Wieters received treatment and had more tests, which came back normal.
The 29-year-old has played in only 101 games the past two seasons, but he played in more than 130 games in each season from 2010 through 2013.
Wieters had Tommy John surgery in 2014.