The Padres designated outfielder Luis Durango for assignment to clear a spot on the 40-man roster for lefty Josh Spence, tweets MLB.com's Corey Brock.
Durango, 25, picked up 53 MLB plate appearances as a backup center fielder last year, hitting .250/.308/.250. He has spent this season as the center fielder for Triple-A Tucson, where he has a .243/.328/.294 line with ten stolen bases.
Spence, 23, was selected in the 9th round of last year's draft and is the first member of San Diego's 2010 draft class to reach the Major Leagues. The reliever posted a 1.71 ERA with 8.0 K/9 and 2.1 BB/9 in 47 1/3 innings (35 appearances) at Double-A this year and he posted an eye-popping 15.8 K/9 after signing last summer.