Roy Sievers, a slugging OF/1B who played for the Browns, Senators, White Sox, and Phillies from 1949-1965, passed away on April 3, 2017 at age 90.
Sievers won the AL Rookie of the Year award in 1949 while playing for the St. Louis Browns.
When the team moved to Baltimore after the 1953 season, Sievers was traded to the Washington Senators. He enjoyed his greatest success during his 6-year stay with the Nats. In 1957 he led the AL with 42 homers and 114 RBI. He topped 100 RBI 3 other times and hit 39 homers in 1958.
Roy played for the White Sox in 1960 and 1961, then spent 2 1/2 seasons with the Phillies.
In mid-1964 he moved on to the (new) Washington Senators, making Roy one of 8 players to have played for both Senators' franchises.
Washington Post obituary
Roy Sievers' story on SABR website