The NBA and MLB have 30 teams apiece, the NHL has 31, and the NFL has 32. Running down all of the uniform changes at the start of the season for any of those leagues is a fairly manageable task. Then you have college football -- 130 FBS schools. That's a lot of ground to cover, but it's still doable.
And then there's Division I college basketball.
Thirty-two conferences! Three hundred fifty-one schools! And many of them seem to change uniforms just about every season. It's no wonder that your friendly uniform columnist tends to be pretty worn out by this time of year.