The baseball industry has learned not to underestimate A.J. Preller during trade season or, for that matter, at any time on the calendar.

The San Diego Padres have placed All-Star outfielder Jackson Merrill on the seven-day injured list on Sunday, a day after he suffered a concussion during Saturday night’s game against the Arizona Diamondbacks.

With a chance to sweep the Padres, the offense was flat and the pitching was not on point in the series finale.

The Diamondbacks made a move to shore up their organizational pitching depth, signing right-hander Anthony DeSclafani to a major league contract and fitting him on the roster by optioning right-hander Bryce Jarvis to Triple-A Reno.

The San Diego Padres lost to the Arizona Diamondbacks via a walk-off infield hit to cap off a five-run inning from the divisional opponents. The Friars fell to