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The Baseline Top 6: Baseball-pitching tennis stars

Thursday marked the MLB's opening day with 15 games played around the country. In honor of the big day for baseball, here's a look at tennis stars that have crossed over to baseball.

1

James Blake

The Miami Open tournament director took a few swings in 2008 at a Florida Marlins vs. New York Yankees game in Marlin Park, not far from the Hard Rock Stadium.

MIAMI - MARCH 29: James Blake takes batting practice before a game between the Florida Marlins and the New York Yankees at Dolphin Stadium on March 29, 2008 in Miami, Florida. (Photo by Doug Benc/Getty Images)
© 2008 Getty Images

2

Bille Jean King

In 2012, the Philadelphia Freedoms co-owner threw out the first pitch before the start of the Philadelphia Phillies vs. Houston Astros game in Philadelphia.

PHILADELPHIA, PA - MAY 15: Tennis legend Billie Jean King poses with the Phillie Phantic after throwing out the first pitch before the start of the Philadelphia Phillies vs. Houston Astros MLB baseball game on May 15, 2012 at Citizens Bank Park in Philadelphia, Pennsylvania. (Photo by Rich Schultz/Getty Images)
© 2012 Getty Images

3

Andy Murray

In 2014, the Scot donned a San Diego Padres baseball jersey for a photoshoot after playing in Davis Cup World Group against the United States in San Diego.

SAN DIEGO, CA - JANUARY 31: Andy Murray of Great Britain poses for a photograph in a San Diego Padres baseball kit after his straight sets victory against Donald Young of the United States in the first rubber during day one of the Davis Cup World Group first round between the U.S. and Great Britain at PETCO Park on January 31, 2014 in San Diego, California. (Photo by Clive Brunskill/Getty Images)
© 2014 Getty Images

4

Milos Raonic

The Canadian launched the first pitch with his racquet for a Toronto Blue Jays game in his home country.

4

John McEnroe

In 2016, the native New Yorker did his part for the New York Mets ahead of their game against the Yankees.

NEW YORK, NY - AUGUST 01: Tennis great John McEnroe throws out the first pitch as pitcher Logan Verrett #35 of New York Mets looks on before a game against the New York Yankees at Citi Field on August 1, 2016 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Rich Schultz/Getty Images)
© 2016 Getty Images

6

Simona Halep

The Romanian entered unfamiliar territory for a Mets game during the 2017 US Open when she was tasked with the first pitch.