Stevens had his contract selected from Triple-A Albuquerque and is starting Thursday's contest at second base against the Diamondbacks.
Stevens will join the big-league club after posting an impressive .362 average with three home runs, 25 RBI, 31 runs scored and six stolen bases in 40 contests with Triple-A Albuquerque this season. The 27-year-old will make his Rockies debut at second base, batting ninth in the series opener at Arizona. In order to make room on the 40-man roster for Stevens, left-handed pitcher Carson Palmquist was designated for assignment, and Brenton Doyle (oblique) was placed on the 10-day injured list.