Even if Nick Ahmed and Yasmany Tomas are ready to come back before September callups, will the team wait so they don't have to let someone go in the process?
-- Stephen G., Swink, Colo.
A lot of times, a team will do what you mentioned and try to keep a player on the disabled list for a few extra days so it doesn't need to make a roster move before rosters expand on Sept. 1. However, with the D-backs in a push for the postseason, every game counts and could make a difference in the end. With that in mind, I would expect that if they believe that either Ahmed or Tomas gives them a better chance to win games than the people they have on the roster, they will go ahead and activate them before Sept. 1.
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What can the D-backs do about Jake Lamb vs. lefties, and his second-half struggles? Seems like this trend is going to continue: a stellar first half followed up by a disappearing act [that] is going to hurt a team.
-- Mike F., Lenoir, N.C.
As for improving against left-handers (.144/5 HRs/16 RBIs), Lamb has worked hard taking extra batting practice against southpaws. When he takes flips in the cage, they've simulated them coming from the angle of a left-handed pitcher. You can see some improvement there in the home runs that Lamb has hit recently against lefties. As for his second-half performance (.223/5 HRs/25 RBIs), he is trying to put the lessons he learned from last season (.197/9 HRs/30 RBIs) -- where he felt like he put too much pressure on himself -- to work this year. Lamb's past three games have been very good. I don't think it's a big concern.

Why don't they make Jorge De La Rosa a starting pitcher?
-- Hector R., Nogales, Ariz.
When they signed De La Rosa after Spring Training began, the D-backs had plenty of candidates for the starting rotation and saw him being effective as a reliever. He has turned in a very nice year out of the bullpen (3-1, 4.57 ERA), and it would be all but impossible at this point of the season to stretch him out to where he could throw the 85-100 pitches that a starter needs. That's a process that usually needs to take place during Spring Training or with a trip to the Minors during the season.