Rodriguez was outrighted to Triple-A Lehigh Valley on Monday, Stephen Gross of The Morning Call reports.
Rodriguez was on the 40-man roster, but he struggled at the Triple-A level in 2015 to the tune of a 6.32 ERA and more walks than strikeouts in 68.1 innings. He was eventually demoted and ended the year at Double-A, but he should get another chance at the Triple-A level next season.