Matz will be available out of the bullpen going forward from Sunday, Katie Woo of The Athletic reports.
Matz will start Tuesday's game in Milwaukee, Derrick Goold of the St. Louis Post-Dispatch reports.
The Cardinals reinstated Matz (back) from the 60-day injured list Sunday.
Matz (back) is traveling with the Cardinals on the road trip starting Friday and is expected to be activated from the injured list during the weekend, Jeff Jones of the Belleville News-Democrat reports.
Matz (back) struck out three batters and gave up four runs (two earned) on five hits and no walks over three innings in his rehab start Tuesday with Triple-A Memphis.
Cardinals manager Oliver Marmol said Monday that Matz (back) will have his pitch count scaled back to 65 in Tuesday's rehab start with Triple-A Memphis, Lynn Worthy of the St. Louis Post-Dispatch reports.
Matz (back) will make another rehab start Tuesday with Triple-A Memphis, MLB.com reports.
Matz (back) is expected to make one more minor-league rehab start prior to being activated from the 60-day injured list, Lynn Worthy of the St. Louis Post-Dispatch reports.
Matz (back) is scheduled to throw about 90 pitches in his rehab start with Tripel-A Memphis on Wednesday, John Denton of MLB.com reports.
Matz (back) will require one more minor-league rehab start before being activated from the 60-day injured list.