FRISCO - FC Dallas has signed OKC Energy FC goalkeeper Jacob Lissek to a four-day USL Short Term Agreement due to extreme hardship and he will serve as backup keeper in Saturday's 18-man roster.

Dallas goalkeeper Chris Seitz suffered a hamstring injury in training earlier this week and is being re-evaluated by the medical staff, but will not be available for selection against Sporting KC. Lissek joined the club in Frisco for training on Wednesday and signed a short-term deal on Thursday.

Lissek, 24, is in his second season with USL-affiliate OKC Energy FC after playing his first pro season with the Charlotte Independence (USL) in 2015. The Highlands Ranch, Colorado-native played collegiately with Farliegh Dickinson where he amassed a 39-21-12 record and a program-best 26 clean sheets.

Each season, each MLS club is allowed a maximum of four USL Short Term Agreement contracts per season for CONCACAF Champions League, U.S. Open Cup, and exhibition matches. Players can be signed for MLS regular season games only in cases of Extreme Hardships when a club has fewer than four available outfield substitutes (less than 14 outfield players available) or has fewer than two goalkeepers available.