The Colorado Rockies, already saddled with a thin major-league roster, now face the loss of right-hander Ryan Feltner and second baseman Willi Castro, both injured during a game against the San Diego Padres, as reported by Deadspin. Feltner, a developing starter whose strikeout rate had ticked up this season, represented one of the few young arms with a path to a mid-rotation role. Castro, a versatile infielder, provided depth for a lineup that ranks near the bottom of the National League in on-base percentage. Their absence forces the Rockies to either promote from a farm system that Baseball America ranks as one of the least deep, or rely on journeymen free-agent pickups. The timing creates an unresolved tension: with the trade deadline approaching, these injuries may either accelerate the need to audition replacements or reduce the club’s willingness to deal its remaining healthy veterans.