The Fight Night card takes place at the Frank Erwin Center in Austin, Texas, and features Donald Cerrone vs. Yancy Medeiros in the main event.
Williams (15-3), who was part of the 17th and 19th seasons of the UFCs reality show in 2012 and 2013, joins the company after winning five in a row on the regional circuit. The South Jersey Strangler holds wins over UFC veterans Jay Silva, Nah-shon Burrell, Ronald Stallings and Andre Gusmao.
Piechota (10-0-1) scored a unanimous decision victory over Jonathan Wilson in his UFC debut last October, scoring his seventh straight victory since fighting to a draw in the Polish scene in 2013. In his last fight before signing with the UFC, the 27-year-old talent beat Jason Radcliffe to win the vacant Cage Warriors middleweight belt.