Bo Scaife was born on 1981-01-06.
Technically Bo Jackson started playing in the MLB first (in 1986), but he didn't play in the NFL until 1991. Deion Sanders, started playing in the MLB in 1989 and in the NFL in 1990. So to answer your question, Deion Sanders played professionally in two sports before Bo Jackson.
Bo Belinsky
NFL
Bo Jackson 4.12 at the NFL Combine. Fastest verified 40.
Bo worked for the Detroit Tigers.
OU is the home team
Bo Jackson 4.18
for about 4 years
Just be a Bo$$ when playing.
Nike
Yes, Bo Jackson played for the Birmingham Barons, a Double-A minor league baseball team, during the 1990 season. He was on the team after his NFL career with the Los Angeles Raiders and before his return to Major League Baseball with the Chicago White Sox. Jackson's time with the Barons was notable as he was attempting to make a full return to professional baseball.