Bassitt (5-4) earned the win Tuesday against the Cardinals, allowing one run on six hits while striking out five over 6.2 innings.
Vazquez is on the Orioles' taxi squad for their Tuesday contest with the Cardinals, Rich Dubroff of BaltimoreBaseball.com reports.
Manager Craig Albernaz said that O'Neill is dealing with right shoulder soreness and is set to get an MRI Tuesday evening, Jacob Calvin Meyer of The Baltimore Sun reports.
Helsley (elbow) threw a bullpen session over the weekend, Andy Kostka of TheBanner.com reports.
Ryan (glute) will throw a live bullpen session of one inning Wednesday, Dan Hayes of The Athletic reports.
The Orioles outrighted Suarez to Triple-A Norfolk on Sunday.
Cowser went 2-for-3 with a solo home run in Sunday's 3-1 loss to the Rays.
Bautista (shoulder) recorded one out in a rehab outing for Double-A Chesapeake on Sunday, allowing three runs on one hit and three walks.
Ryan (glute) completed a 35-pitch bullpen session in St. Paul on Saturday, MLB.com reports.
Lee went 1-for-3 with a solo home run in Sunday's 8-1 loss to the Padres.
