Thatcher, who was battling right knee tendinitis and was placed on the disabled list retroactive to July 26, is pitching a rehab outing Wednesday with Class A Lake Elsinore. If all goes well, manager Bud Black says he expects the 30-year-old lefty specialist to fly with the team to Colorado and be activated in time for the series opener with the Rockies on Friday.
Street, who is a perfect 21-for-21 in save opportunities this year, was placed on the disabled list Aug. 11 with a strained left calf. He will head to Lake Elsinore on Friday for a rehab outing, and if all goes to plan, will fly to Colorado on Saturday in time to be activated for Sunday's game, according to Black.
Street hasn't given up a run since June 17, a 20 1/3-innings scoreless streak. He's struck out 45 batters in 36 innings this season.
Thatcher is 0-4 in 40 appearances this year, but has a 3.42 ERA and has struck out 28 in 26 1/3 innings pitched.
Both restore a veteran presence to a bullpen that currently is home to seven rookies and Luke Gregerson, who has split closing duties with Dale Thayer in Street's absence.