Nicholas John Christiani (born July 17, 1987) is an American former Major League Baseball (MLB) pitcher who played for the Cincinnati Reds in 2013 and 2014.

Christiani is originally from Linden, New Jersey and attended Seton Hall Prep before moving onto Vanderbilt University where he would play for the Commodores.

After spending 2010, 2011, 2012, and the beginning of 2013 in the minors, Christiani was called up to the majors for the first time on August 22, 2013.

He was outrighted on August 6, and stayed in the Reds minor league system until he was released on June 21, 2017.

This biographical article relating to an American baseball pitcher born in the 1980s is a stub.