DENVER -- Veteran right-hander Mike Ekstrom, who has pitched for the Padres (2008-09) and the Rays (2010-11), joined the Rockies after his contract was purchased from Triple-A Colorado Springs.
Righty Tyler Chatwood (1-1, 7.62 ERA), who struggled with throwing strikes in a long relief role, was sent down to Double-A Tulsa, which had a rotation spot open.
Ekstrom, 28, was 2-1 with a 2.64 ERA, 51 strikeouts and 15 walks in 47 2/3 innings with Colorado Springs. In 36 Major League games, Ekstrom is 0-3 with a 5.36 ERA, 36 strikeouts and 24 walks.
Purchasing the contracts of Ekstrom and infielder Josh Rutledge, who had been at Double-A Tulsa, meant the Rockies had to clear a spot on the 40-man Major League roster. They did so by moving left-handed pitcher Jorge De La Rosa (recovering from left elbow surgery) from the 15-day disabled list to the 60-day DL. Players on the 60-day list do not count against the 40 players eligible for Major League service.