Tommy Pham was diagnosed with a progressive degenerative eye disease in 2008, six years before he made his major league debut. Keratoconus causes the cornea to thin and weaken, leading to vision distortion, not ideal for someone hitting baseballs for a living.

Pham, in his 12th MLB season, was scheduled to sit out Friday night, but he has elected to appeal the punishment.

Tommy Pham was unhappy after a fan touched him and his obscene gesture was caught on camera. Here's a look at the video.