Seguí threw the first ever pitch for the then-new Seattle Mariners.
Seattle Mariners
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He played for the Texas Rangers, New York Mets, and other baseball teams.
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Henderson also led MLB in runs, with 2,295 in his 25-season career.
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He was also the first non-white player on the Detroit Tigers.
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A slugger from the 1960s and ‘70s, he finished his career with 382 home runs.
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He was a color commentator for the A’s after his playing career.