Biggest impact of Josh Naylor trade may still be to come

While the Seattle Mariners landed an impact bat on Thursday night, their trade for Josh Naylor has also likely impacted the entire upcoming MLB trade deadline.

On Thursday, Seattle sent a pair of top pitching prospects to the Arizona Diamondbacks in exchange for Naylor, with left-hander Brandyn Garcia (ranked as Seattle's 13th-best prospect by MLB.com) and right-hander Ashton Izzi (ranked as Seattle's 16th-best prospect by the same rankings) heading to the desert.

Knowing what the Diamondbacks received in exchange for Naylor could well set the market for what is to come between now and the conclusion of the 2025 MLB trade deadline, set for 6 p.m. (Eastern) on July 31. The 28-year-old first baseman was ranked by The Athletic as the 17th-best trade candidate likely to be available, but ranked behind just one other first baseman (Baltimore's Ryan O'Hearn, who was slotted in at 16th).

If Naylor brought in a pair of pitching prospects, including Garcia, who has appeared in two games this season for Seattle, the Diamondbacks could be salivating over what third baseman Eugenio Suarez and his 36 home runs could bring in return.

All MLB teams who will be buying or selling at this year's trade deadline have had the first price bar set for them with the Naylor deal. Now it will be fascinating to see what comes next, especially knowing that Naylor will be a free agent at the end of this season.

If Seattle gave up two pitching prospects for a player who could be a late-season rental only, imagine what the Minnesota Twins may be able to recoup for starting pitcher Joe Ryan (under team control through the 2027 season) or the Boston Red Sox might get back for outfielder Jarren Duran, who won't be a free agent until the 2029 campaign.

While Naylor may not be the biggest move to come during this span before the trade deadline comes to a close, his deal could be the one that establishes selling prices for the trades that are to come.

With so few MLB teams expected to be outright sellers, the price for available talent was expected to be high. We learned on Thursday night with the Naylor swap just how high those prices may go.