The Reds outrighted Johnson to Triple-A Louisville on Thursday, Charlie Goldsmith of Fox 19 Now Cincinnati reports.
Jenkins underwent right elbow debridement surgery Wednesday, Bobby Nightengale of the Minneapolis Star-Tribune reports.
Buxton had the stitches removed from his surgically repaired right hip earlier this week and has begun the rehab process, Dan Hayes of The Athletic reports.
Williamson (5-5) took the loss Sunday against Toronto, striking out three while allowing four runs on four hits and three walks in three innings.
Bell went 1-for-2 with a home run, a walk and three RBI in Sunday's 6-4 win over the Rangers.
Kremer (5-5) earned the win against the Rangers on Sunday, allowing one run on three hits and no walks with four strikeouts over seven innings.
Lewis went 2-for-4 with a solo home run and a stolen base in Sunday's 6-4 win over the Rangers.
De La Cruz went 1-for-4 with a two-run double and a steal during the Reds' 6-5 loss to the Blue Jays on Friday.
Lodolo did not factor into the decision Friday against the Blue Jays, allowing two runs on seven hits and two walks while striking out three across five innings.
Pagan allowed one hit and no walks in a scoreless ninth inning to earn the save Thursday against Atlanta. He struck out one.
