Clarence Mitchell...he had an unspectacular career in the majors and is probably mostly remembered for making 5 outs in two at bats in the 1920 World Series...he is also the last legal spitballer in the majors. He was known as Mr Baseball in Nebraska though and played many years in the minor leagues in and around Nebraska.
I am also fond of George Johnson...he played for the Nebraska Indians ball team, then the Lincoln minor league club...finally making the major leagues..he also played in the Federal League and the Pacific Coast League. He was murdered over a dice game in Des Moines, Iowa shortly after his playing days ended.