SEATTLE -- While Dave Dombrowski held on to Yoan Moncada through Monday's trade deadline and said he considers the top prospect close to the majors, don't expect Moncada to be a postseason pinch-runner extraordinaire for Boston.

The Red Sox have made a habit of adding speed specialists to their postseason rosters, including Dave Roberts, Joey Gathright and Quintin Berry. Dombrowski said such a player is valuable come October — "you look at any little bit [of advantage] that you possibly can," he said — but doubts Moncada would fill that role.

Moncada has stolen 44 bases in 54 attempts this season between High-A and Double-A.

"He has the speed to do it," Dombrowski said, "but I would doubt it. "I'm not saying we won't [use Moncada that way], but I'd say I doubt it."