@Html.ActionLink("Change Team", "Edit", "UserPlayers", new { MatchId = ViewBag.MatchId, UserId = ViewBag.UserId })

http://localhost:50013/UserPlayers/Edit?Length=11

@Html.ActionLink("Change Team", "Edit", "UserPlayers", new { MatchId = ViewBag.MatchId, UserId = ViewBag.UserId }, null)