Robertson is coming off a big year with Colorado Mesa in 2014, hitting .372 (73-for-196) through 55 games with the Mavericks. He scored 54 runs and batted in 47 more and also hit 12 doubles, three triples and six home runs on his way to a .556 slugging percentage as CMU made it to the College World Series. He also stole 24 bases in 27 attempts for CMU and collected 109 total bases, both second-best for CMU. He was named an ABCA All-American and RMAC Player of the Year in his sophomore season in 2013, hitting .381 (80-for-210) with 13 doubles, two triples and five home runs for the Mavericks as they made it to the NCAA South Central Regional Tournament.