Jonathan Lucroy hit his seventh home run for the Texas Rangers on Wednesday in a 6-2 win over the Oakland A's.

That becomes more impressive when you stack it next to another number: 15.

Toronto Blue Jays third baseman Josh Donaldson exited Wednesday's game against the New York Yankees with a thumb injury.

Continue for updates.

Welcome to the sixth 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:

The next time someone tells you that baseball is boring, kindly point their attention to the stretch run, which promises to be far more exciting and entertaining than any meaningless NFL preseason game could ever hope to be.

Three divisional races are incredibly tight, with less than five games separating first and second place (and in some cases, third place). Things are even more hectic in the wild-card race, with 10 teams, five in each league, within six games of a playoff berth.

CHICAGO — In sports, we're used to losses prompting overly emotional and one-word reactions. Not so for the Chicago Cubs under manager Joe Maddon.

Sure, a baseball season is 162 games, but the sport still has its share of teams that allow a loss to linger. Maddon said he has been part of teams like that, so his objective when he joined Chicago in October 2014 was to keep emotions on an even keel.

For some teams, questing for a World Series trophy requires sticking with whatever's working.

The Toronto Blue Jays don't have that luxury.

On Tuesday, shortstop Dansby Swanson got word that he's headed to the big leagues and will debut Wednesday with the Atlanta Braves, per the team's official Twitter feed.

On Monday, right-hander Shelby Miller made a start for the Reno Aces—the Arizona Diamondbacks' Triple-A affiliate.

In order to achieve the type of sustainable success that every MLB team is searching for, the front office always needs to have an eye on the future.

Whether a team is a contender in 2016 or already focused on 2017, it's never too early to start looking ahead at how each team is lining up future success.

After seven seasons, it appears outfielder Coco Crisp and the Oakland Athletics are headed for a contentious divorce. 

Continue for updates.

A little after 1 p.m. Sunday, a Los Angeles Dodgers pitcher not named Clayton Kershaw took the mound.

Fifteen minutes later, the Dodgers were down 5-0, and the pitcher not named Clayton Kershaw was done for the day.