The first Diamondbacks trade domino has fallen, as first baseman Josh Naylor is heading to the Seattle Mariners.

Who won the Josh Naylor trade between the Arizona Diamondbacks and Seattle Mariners? Check out early grades to Josh Naylor ...

In a move that highlights their aggressive strategy before the MLB Trade Deadline, the Seattle Mariners made headlines by ...

MLB trade deadline action officially kicked off when the Seattle Mariners acquired first baseman Josh Naylor from the Arizona ...

The Seattle Mariners have acquired lefty-batting first baseman Josh Naylor from the Diamondbacks. Arizona gets left-hander ...

The Arizona Diamondbacks have made a big move this month, but they could continue to make more moves as the trade deadline ...

Mike Salk explains how the Seattle Mariners' trade for Josh Naylor puts them in better position to make additional moves before the trade deadline.

On Thursday, the Arizona Diamondbacks kicked off their Trade Deadline early, trading first baseman Josh Naylor to the Seattle ...

The Arizona Diamondbacks have already made one big trade this year, but they could continue selling as aggressively as any ...

The Naylor trade likely signifies more moves to come, with the Diamondbacks sitting near the basement of the National League ...

The Mariners acquired first baseman Josh Naylor from the Diamondbacks on Thursday, one week before the MLB trade deadline.

The Arizona Diamondbacks have already made one big trade this season. Now, they're likely going to be looking to make more ...