Joe Frisaro reports at his blog, The Fish Pond, that there is a uniform number change by a couple of the pitchers.

You will notice Anibal Sanchez is now wearing No. 19, which belonged to reliever Logan Kensing last year.

Sanchez asked if Kensing wouldn't mind switching to another number. Kensing took No. 20,

 Don't know who will claim number 36, but if you like me and have to watch the Marlins on a computer screen, the player's numbers are very important to the viewing experience.  Though I think I could've easily figured out that Logan wasn't starting the game.