They understand each other in a way that no one else can. They ask each other questions that no one else can answer.
And when one of their own is pitching on national TV, they're going to do what they can to watch.
So last Sunday night, Steve Sparks skipped the NBA playoffs and watched baseball's latest knuckleball king instead.
It was a good night to watch Steven Wright, a 31-year-old who flings his knuckleballs for the Boston Red Sox. Wright came within one out of a complete-game shutout against the New York Yankees.