Major League Soccer
US Soccer

Referee Timeline

1996 - The first Major League Soccer season.

2012 - March: U.S. Soccer and MLS created PRO.

2012 - March: Peter Walton appointed PRO General Manager.

2012 - October: launched.

2013 - The 100th referee since the inception of Major League Soccer in 1996 officiated an MLS game.

2013 - March: First full MLS season with PRO involvement kicked-off.

2013 - April: Inaugural NWSL season started, officiated by affiliated officials from PRO.

2014 - July: PRO joined forces with Match Analysis to improve performances.

2014 - October: Three PRO officials refereed in the inaugural Indian Super League.

2015 - November: Daltonic Films produced behind-the-scenes video with PRO, published by FOX Soccer > click here to watch.

2016 - February: TAG Heuer announced as official timekeeper of PRO.

2016 - March: PRO held first Referee Development Academy.

2016 - July: PRO partnered with TeamXStream to enhance training and development.

2016 - August: MLS approved by The IFAB for Video Assistant Referee testing in United Soccer League.

2016 - August: PRO officials made history with use of video replay technology in USL.

associated partners
Major League Soccer US Soccer Canadian Soccer Association North American Soccer League United Soccer Leagues National Women's Soccer League TAG Heuer Polar