STATESBORO — Georgia Southern men’s basketball head coach Mark Byington has been given a four-year contract extension through the 2018-19 season following the Eagles’ runner-up finish in the Sun Belt regular season and a trip to the Sun Belt Championship Game, according to gseagles.com.The 2014-15 Eagles went 22-9 in Byington’s second season and posted the program’s first 20-win season since the 2005-06 campaign. The season featured a 14-6 league record, the No. 2 seed for the Sun Belt Tournament and reached the championship game.