This is written for baseball, but you can apply these comments to any sport.
If the game has a rain delay, you still have a pass for the new time. You are still responsible for being there. You can make amazing photos when it’s wet! Look for features in the stands, look for players goofing off, look for action shots with big splashes as people slide into base.
The school has rain covers for the long lenses and some cameras. Ask for them at the window. We also have a GoPro camera with a waterproof case. It’s very small and it might make some fun features.
Some places in the stadium that are covered. Check out the other photographers who are at the game. Especially the photogs from The State newspaper. Or find Alan Sharpe and/or Mary Ann Chastain. They cover a lot of games, they are very professional, and they love to mentor our students. They’ll have good tips, too, and maybe even plastic or something you can borrow.
There are lots of ways to use plastic bags to cover your lens, but use rubber bands or gaffer tape to make an opening so you can see. Be sure you have a raincoat for yourself. Bring chamois clothes or towels to dry off
you and your gear. Bring a small cloth to wipe your lens often. Bring extra socks or shoes if you don’t like to be squishy.
Here are a couple web sites I found really quickly. I’m sure you can find more. You don’t need to buy a lens raincoat, but you can see how to rig something on the cheap.
7 Steps for Taking Photos in the Rain | Yanik’s Photo School
Rain Protection| B&H Photo Video