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Now this is how you haze rookies. Veteran reliever Javier Lopez dressed up San Francisco Giants rookies as Times Square's famous "Naked Cowboy." The results were stunning.

Hat tip to Giants reliever George Kontos for the photos.

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Andy Pettitte has pitched in the major leagues for 18 years, but his career is coming to a close. The veteran pitcher announced that he would retire at the end of the season on Friday, per the Yankees' Twitter feed: 

Andy Pettitte will retire following the 2013 season. #icon

The New York Yankees are in the thick of a playoff race, but that may not stop left-hander Andy Pettitte from announcing his retirement Friday afternoon, tweets Joel Sherman of the New York Post.

In the bottom of the first inning against Houston, Cincinnati Reds second baseman Brandon Phillips pulled a cruel, cruel trick on Astros shortstop Jonathan Villar when he forced him to slide directly into his butt while protecting second base.

As if his head placement wasn't embarrassing enough, Villar was called out on the play.

Hat tip to SB Nation for the GIF. 

A disappointing season for the Toronto Blue Jays has just soured even more with the news that Edwin Encarnacion will be out with a wrist injury.

According to Shi Davidi of SportsNet, the first baseman will undergo surgery on his left wrist:

Surgery on left wrist for Edwin Encarnacion, Brett Cecil to DL with elbow discomfort.

The Washington Nationals showed solidarity with victims of the tragic Navy Yard shooting by wearing Navy ballcaps during batting practice today. It was a touching gesture that shows the Nationals are standing behind all those affected by this incident.  

The hats were hand-delivered by a Navy Admiral. 

My eyes will never be the same after watching this.

During Monday's 7-1 win over the Cleveland Indians, a Royals fan celebrated Lorenzo Cain's sixth-inning triple with a belly-shaking dance.

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Vladimir Guerrero, one of the most dangerous hitters of the late-1990s and 2000s, has retired, reports Hector Gomez of Listen Diario (Spanish link).

Guerrero had this to say on the difficult decision (via Gomez): 

Major League Baseball is infatuated with round numbers. Chris Davis of the Baltimore Orioles reached a special one on Friday night with his 50th home run of the year.

Watch him flaunt his opposite-field power with this eighth-inning blast to break a 3-3 tie in an eventual O's victory:

We can add back-to-back-to-back home runs to the list of amazing things that the 2013 Pittsburgh Pirates have accomplished.