Chuck made his major league debut with the
Orioles two seasons later, on April 21, 1960, in front of a crowd of 9,377 at
Memorial Stadium. Estrada came in relief for
starting pitcher Steve Barber in the 5th inning, and pitched two innings of one-hit ball with five
strikeouts. Estrada also was on top of the
American League in
hits allowed per nine innings, and finished with a twelve
complete games, 144
strikeouts and a 3.58
earned run average. The
All-Star Estrada finished second in the
Rookie of the Year voting, falling distantly behind Orioles teammate
Ron Hansen. He placed 12th in the
American League Most Valuable Player Award voting, Estrada also was on the
Topps All-Star Rookie Roster under the category of right-handed
pitcher. Estrada had another successful season in , pitching in thirty three games for the Orioles. He had a 15–9 record, a 3.69
earned run average and 160
strikeouts in 212 innings of work. He again led the league in
hits allowed per nine innings. However, Estrada again showed signs of wild pitching, as he issued a league-high 132
walks, thirty-one higher than that of his rookie season. He again placed second in the league by hitting ten
batters in the season, finishing only one lower than the leader,
Jim Kaat, of the
Minnesota Twins. The next season was disastrous for Estrada, as he led the league with seventeen
losses. He only collected nine wins on the season, and his
ERA ballooned to 3.83. He had 121 walks in 223.1
innings, finishing a close second behind
Los Angeles Angels rookie
southpaw Bo Belinsky. Estrada's woes did not end, though. The following season, Estrada pitched in only eight games during the season. On June 8, 1963, Estrada suffered an elbow injury with bone chips and a spur in his right elbow, and was done for the season. The following season, Estrada came in as a relief/starting pitcher for the Orioles. It seemed the elbow injury had affected Estrada's pitching. He pitched only 54.2 innings that season, but he posted a 3–2 record with a 5.27
ERA. ==Across the league==