Established in 1977 as part of that year's Major League Baseball

Seattle Mariners team name history

Where Does the High Five Come From?

Oldest Teams in Major League Baseball

Seattle Mariners play their first game, a 7-0 loss to the California Angels at the Kingdome, on April 6, 1977.

American League, Baseball Wiki

WHEN TOPPS HAD (BASE)BALLS!: GIMMIE A DO-OVER: 1977 BILL GREIF

Arizona Diamondbacks, History & Notable Players

All Time Minor League Seasons: OF - by Roger Munter

April 7, 1977: A snowy beginning for Toronto's major-league debut – Society for American Baseball Research

San José City College - Did you know? One of the all-time greatest pitchers in major league baseball, Dave Righetti, was a student at SJCC in 1977-78. During his first year playing

October 2, 1977: Dusty Baker hits 30th homer, receives first-ever high-five from Glenn Burke in Dodgers' loss to Astros – Society for American Baseball Research

Topps Project70® Card 139 - 1977 Shohei Ohtani Signed by Quiccs – TOY TOKYO

Rawlings MLB All-Star Game Commemorative Baseball

How the Baltimore Orioles Achieved a Historic Turnaround - The Ringer

1977 MLB All Star Game NEW YORK Original NBC Broadcast