She should be fine. Just bring everything you need to clean her ears.
Dummy me had my daughter's ears pierced before soccer was out. Totally wasn't thinking. Noone said anything at practice--but at the game, the jerk of an assistant coach had a parent (not me--we were getting another child from another field as we had done every single weak) remove her studs. One was stuck, so they taped over that one, but removed the other one. Dirty hands, no sanitize and 3 day old pierced ears! I was LIVID! I was livid that they couldn't wait 5 minutes and I was livid that they did not give her a choice to be benched or take them out and I was livid that they took no measures to be sanitary when my child gets ear infections easily. (sidebar--she is allergic to metals except 14K gold and higher and sterling silver--so the notion of someone not washing her hands or using antiseptic upset her greatly as we were trying this road again!)
Anyway--I showed up to a crying child and panicked because we simply could not get her earring back in. We went home, cleaned up everything and were successful with a little pinching to get it back in.
She decided she would never play soccer again because they did not ask her permission--they just took the earrings out. Yes, I got their side of the story.
All that said--at 8 weeks, she should be fine for one hour. Just be sure to put the studs back in immediately after cleansing her ears. Supposedly our league doesn't let kids play with tape--but funny when one earring got stuck, it was suddenly okay.

My daughter's ear did not close up.
I would not count on the league allowing the tape.