Gillenwater has a batting average of .260 in his time in baseball in addition to 129 scored runs and an OPS of .450. He has been struck out 138 times and has been walked on 153 occasions, which has contributed to a .359 on-base percentage. For his professional baseball career, Gillenwater has hit 11 balls out of the park while driving in 114 runs. He has accumulated a slugging percentage of .091 in addition to having tallied 349 bases. In his time in the Majors, he came to the plate 1,176 times and has come through with a base hit 261 times.
