The two time All Star would hit at least 20 Home Runs in five of his six seasons in KC, three of which would also see him exceed the 100 RBI mark. Mayberry also possessed strong plate discipline as shown by his 1973 American League Leading .417 On Base Percentage. He would finish second on that category in 1975 and third in 1972. His best season was in 1975 where he finished with career high numbers in Home Runs (34), Hits (161) and Doubles (38) with a nice Slash Line of .291/.416/.547. He was voted the runner-up that year for the American League MVP Award.
Unfortunately, Mayberry declined and fell out of favor with management and was benched in the 1977 playoffs against the New York Yankees. He was subsequently sold to the Toronto Blue Jays.Mayberry loses out on a higher ranking primarily due to his poor defensive skills even for a First Basemen.