The MLB trade deadline is on July 31 and trade speculation and rumors are running rampant. The Arizona Diamondbacks are in the middle of the speculation. In fact, one MLB insider says the team could be the "epicenter of the trade deadline.

Arizona has started 9-4 in June. The team is winning close and late. (Josh Naylor hit a walk-off grand slam against Seattle and added another game-winning RBI against San Diego.) They’re winning games when they score. (The Diamondbacks have two 10-run games in June. Both victories.)

If the Diamondbacks do end up a seller in front of the trade deadline, they'd turn some heads. Pitchers Zac Gallen and Merrill Kelly along with corner infielders Eugenio Suárez and Josh Naylor are all free agents at the end of the season and could net a decent return.

The Cubs should look to add at the MLB trade deadline, and the Diamondbacks have the perfect fits if they are sellers.

The Arizona Diamondbacks open a nine-game, three-city road trip in Toronto on June 17, where they will play the Blue Jays.

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The start second baseman is in line to make his second straight start in the mid-summer classic if the fans co