The Merck Soccer League (aka MSL) is a coed, refereed, full field, 11 vs. 11 league with both company and non-Merck employees.

Members of this league are required to pay annual dues which are currently set at $95. The league begins in April and concludes in September with playoffs and a end of season party.

League matches are scheduled Mon-Thur evenings at local fields (TBD). There are currently six color-coded Merck teams (Blue, Gold, Green, Orange, Red and White). Each team plays other team three times for a toal of 15 games and is allowed to have up to 25 active players on their roster. After all of the team rosters are full, a reserve list is started and maintained by the league officials. A new player(s) may be assigned to a team roster to replace an injured player or a player that may have dropped out due to other personal reasons. Teams are not allowed to add new players to their rosters after July 1.