Betancourt was put on the DL on July 20 with appendicitis. The 38-year-old closer is 2-3 with a 3.16 ERA and has converted 15 of 16 save opportunities.
Rex Brothers served as closer in Betancourt's absence.
Colorado made room for Betancourt by optioning right-hander Manuel Corpas to Triple-A Colorado Springs.
Corpas pitched in 19 games for Colorado this season after beginning the year with Colorado Springs. He was 1-2 with a 4.50 ERA.
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