Boston Red Sox designated hitter David Ortiz hit his 36th double of the season in Tuesday's 5-4 loss to the Seattle Mariners, setting a new single-season record for doubles by a player age 40 or older, per ESPN Stats & Info.

The old record of 35 was set way back in 1930 by Hall of Famer Sam Rice, who was 40 years old throughout the entire season and ultimately ended up playing four more years.

The New York Yankees (53-53) and New York Mets (55-51) split the first two games of the Subway Series at Citi Field and will play the next two at Yankee Stadium starting Wednesday.

Welcome to the fourth edition of Bleacher Report's MLB rivalry series.

In the weeks to come, we'll highlight some of the biggest head-to-head rivalries in our national pastime and shine light on the past, present and future of those matchups.

So far, we've run through the following rivalries:

As one window shuts, another one opens.

While MLB's non-waiver trade deadline came and went at 4 p.m. ET on Monday, the opportunity to continue making deals exists thanks to the waiver trade period, which runs through Aug. 31.

Although the MLB non-waiver trade deadline passed on Monday afternoon, the trading window hasn't yet fully closed.

Teams can still arrange trades by placing players on revocable waivers. If someone clears, he's eligible to get dealt in August. If a franchise doesn't want to outright relinquish the rights to a claimed player, it can pull him back and negotiate with that team during a 48-hour window.

Sean Conroy's trip to the National Baseball Hall of Fame last November wasn't his first. His hometown of Clifton Park is roughly 70 miles from Cooperstown, so he'd seen the exhibits about baseball's immortals.

But it's different when you go to gaze at your own.

Monday's MLB non-waiver trade deadline didn't disappoint, as 18 deals transpired on the final day.

The 2016 MLB trade deadline came and went Monday afternoon. After a flurry of activity, the MLB landscape has been significantly altered.

Generally a Monday morning staple, we held off an extra day on this week's MLB power rankings so as to include all of the deadline action in determining where teams fall this time around.

While recent performance still played a role in shifting positions, as it does in our normal rankings, the main focus this time around was on what teams did at the deadline.

Trading places, trading stories, trading, trading, trading….reactions, thoughts and takeaways…

1. Sacred Moment, Sacred Teams

Maybe the Chicago Cubs break their 108-year World Series-less drought this year, maybe they don't. But in picking up closer Aroldis Chapman, the Cubs boldly made the move they needed to make to give this team an even better chance to win.

Unless you're discovering baseball for the first time or have been stuck in a dark cave somewhere, you know Monday marked the passing of MLB's non-waiver trade deadline. But that doesn't mean baseball's trade season is over.