Thursday Night Baseball (also known as MLB Network Showcase) is the title of a presentation of Major League Baseball on cable and satellite channel MLB Network (self-produced by MLB Network), that premiered on April 9, 2009. Longtime NBC Sports broadcaster Bob Costas is one of the play-by-play voices of the broadcasts. Matt Vasgersian also does play-by-play on some games. Al Leiter, Joe Magrane, Dan Plesac, Harold Reynolds, Mitch Williams and Jim Kaat provide color commentary.