With the MLS transfer window opening Thursday, ESPN looks back at some of the best and worst big-money signings in league history.

Chelsea could mount a serious Premier League title challenge in 2025/26 with the Blues continuing to eye more signings in the summer transfer window ...

Arsenal have had a busy summer transfer window with Viktor Gyokeres the latest name to join Mikel Arteta's side ahead of the 2025/26 campaign ...