Dear all

I have the following data:

posteam date gameid Kicker
DAL 2009-09-28 2009092800 N.Folk
DAL 2009-09-28 2009092800 N.Folk
DAL 2009-09-28 2009092800 N.Folk
BUF 2009-10-04 2009100408 R.Lindell
BUF 2009-10-04 2009100408 R.Lindell
CHI 2009-10-04 2009100400 R.Gould
CHI 2009-10-04 2009100400 R.Gould


What I want to analyze is the following: For the subdataset above one can see that the kicker stays the same during the same game for its team. However, I would like to know if there are games in which the kickers were substituted e.g. for gameid 2009092800 the first two field goal were scored by N.Folk but then he was substituted by another kicker who kicked the third field goal.
I am ooking for this kind of changes regarding the kickers during the same game and within the same team.

Thank you and kind regards
Giulia