Jayson Werth of the Los Angeles Dodgers during batting practice before game against the Arizona Diamondbacks at Dodger Stadium in Los Angeles, Calif Stock Photo - Alamy

Baseball baseballs batting practice hi-res stock photography and images - Alamy

Washington Nationals right fielder Jayson Werth (28) bats during a baseball game against the San Diego Padres at Nationals Park Friday, July 5, 2013, in Washington. (AP Photo/Alex Brandon Stock Photo - Alamy

Dodger field hi-res stock photography and images - Page 14 - Alamy

Jayson Werth of the Los Angeles Dodgers during batting practice before game against the Arizona Diamondbacks at Dodger Stadium in Los Angeles, Calif Stock Photo - Alamy

2011 baseball hi-res stock photography and images - Page 17 - Alamy

Dodger field hi-res stock photography and images - Page 14 - Alamy

Dodger st hi-res stock photography and images - Alamy

Jayson Werth of the Los Angeles Dodgers during batting practice before game against the Arizona Diamondbacks at Dodger Stadium in Los Angeles, Calif Stock Photo - Alamy

Arizona Diamondbacks third baseman Ryan Roberts against the Washington Nationals during a MLB baseball game on Thursday, June 2, 2011, in Phoenix. (Rick Scuteri/AP Images Stock Photo - Alamy

Washington Nationals right fielder Jayson Werth (28) stands at second base during their game against the Florida Marlins in the second inning at Nationals Park in Washington, D.C, Saturday, September 17, 2011. (