Real Salt Lake Front Office
Booth is the 3rd MLS player that Bayern have recently signed, joining Alphonso Davies and Chris Richards.
Landon Donovan declined an offer to play for Real Salt Lake in January.
MLS commissioner Don Garber responded to criticism of his league made by Jürgen Klinsmann.
There are currently 15 MLS players who earn more than $1 million per season, headlined by Kaka at $7.17 million and Clint Dempsey at $6.7 million.
The MLS will have featured games broadcast on Friday and Sunday nights.