The Arizona Diamondbacks swung baseball's first major deal ahead of the trade deadline, sending first baseman Josh Naylor to the Seattle Mariners on July 24 in exchange for a pair of pitching prospec...

Naylor should be a considerable offensive upgrade at first base over Donovan Solano, who is hitting .243 with a .626 OPS, three homers and 20 RBIs in 64 games, and Luke Raley, who is batting .220 wit...