Answered June 16th, 2019

The Ketel Marte breakout campaign continues as he joins MVP front-runners Christian Yelich and Cody Bellinger as the only players in the majors currently with at least 20 HR, 50 RBI and 50 R.

who was the last player with at least 20 hr, 50 rbi and 50 runs scored this season
Interpreted as:
Who was the last player with at least 20 hr, 50 or more rbi and 50 or more runs scored this season?