Erasmo Ramirez will enter salary arbitration a year early, according to off-season calculations from MLB. Normal rookie contracts allow arbitration in the final three years, but enough play at the major league level can kick that process off a year early.
The take away would be that this makes Ramirez more expensive over time, but he was a worthwhile piece of the rotation in 2015 and should continue to be next season. It was a gamble to acquire him for Mike Montgomery at the start of the season, but after two rough outings while learning the Rays Way of pitching, he settled into some incredible baseball.