Excuse me but the Colorado Rockies did not win 21 straight games. The actual MLB record for most consecutive wins rests with Theo's Cubbies when they won 21 staight in 1935. Tha AL record was set by your Oakland A's in 2002 with 20 consecutive wins. (Featured in Moneyball)
To split hairs, the most consecutive wins is with the NY Giants who had 26 consecutive wins. HOWEVER, that inckluded a TIE in one game, As MLB does not include ties, the record defaults to Cubs.
You can look it up.