On September 17, 1955, at Memorial Stadium in Baltimore, Brooks Robinson made his major league debut. The Orioles were facing the Senators and pitcher Chuck Stobbs. Robinson, batting sixth in the Orioles line up, came to bat for the first time in the bottom of the 2nd, flying out. In the bottom of the fourth Robinson came to the plate again, this time singling to left field. He flew out agin in the sixth, and in his final plate appearance of the day he singled and drove in pinch runer Dave Pope. Overall he finished 2 for 4 with one RBI.
Brooks only appeared in 6 games in 1955 and didn't become a full time major leaguer until 1958. From then on, third base in Baltimore belonged to Brooks.
On September 22, 1966 the Baltimore Orioles faced the Kansas City Athletics in a game at KC's Municipal Stadium. Orioles ace Jim Palmer was on the mound for Baltimore while Lew Krausse took the ball for the Athletics.
The Athletics took the early lead in the bottom of the second when Sal Bando doubled, scoring Larry Stahl from second. The Orioles came back strong in the third with Luis Aparicio and Frank Robinson crossing the plate and the Orioles were ahead 2 - 1. In the top of the fifth the Robinson boys (Brooks and Frank) both scored increasing the Baltimore lead to 4 -1.
The Athletics brought Catfish Hunter into the game in the sixth inning but he couldn't contain the Baltimore offense. Luis Aparicio singled and scored while Russ Snyder double and scored, increasing the lead to 6 - 1. Jim Palmer held the lead through the ninth inning, ending the game on a line-out by Royals 2B Dick Green. With that, the Orioles won the first American League pennant in franchise history.
The Orioles finished the season with a 97 - 63 record. In the AL Division Series they faced the Cleveland Indians and took the series 3 - 1. In the World Series the met up with the LA Dodgers and to the surprise of many they swept them 4 - 0 to win the first World Series title for the franchise in Baltimore.