The first in a series of big games in the Pacific League arrived for the Arcadia high school baseball team on Tuesday, and the Apaches couldn’t of handled it any better, with pitcher Gus Cooper leading the way. Cooper threw a no-hitter in Arcadia’s 10-0 mercy-shortened five-inning victory over a tough-hitting Burbank squad to remain undefeated in the Pacific League. Arcadia improved to 21-2 and 11-0 in league play while dropping Burroughs to 18-…