I have some anecdotal evidence for you.

Leeds United players all took the booster either last week or after Saturday’s game against Arsenal. https://archive.md/caTiZ#selection-807.42-807.125

They just had to cancel their next game against Liverpool on December 26th due to positive tests: https://www.theguardian.com/football/2021/dec/23/liverpool-v-leeds-and-wolves-v-watford-off-on-boxing-day-due-to-covid-premier-league