cuellar was traded to the baltimore orioles in december 1968. finally, he had established a permanent role with one of baseball's up-and-coming franchises, as he found spot in the orioles' starting rotation. with the acquisition of cuellar, joining the likes of jim palmer and dave mcnally, and sluggers frank robinson, brooks robinson and boog powell, the orioles began one of the strongest sequences of years in professional baseball in 1969. in august of that year, cuellar accomplished a sequence where he retired 35 batters in a row, without issuing a walk or giving up a hit. the streak was ended on sunday, august 10 by césar tovar of the minnesota twins, as cuellar was three outs away from recording his first career no-hitter; tovar's hit, which came in the top of ninth inning, was the only one the twins would manage against cuellar in his complete-game shutout (a 2-0 home victory).