What happened: Toronto FC said midfielder Nelson Palacio underwent successful thigh surgery. He arrived in July and will spend the rest of the MLS season in recovery rather than on the field.

Why it matters: The injury removes a midfield addition Toronto FC made for the second half of the year and leaves the club with one fewer option for late-season rotation. It also pushes any real on-field evaluation of Palacio's fit in Toronto into next season.

What to watch: Toronto FC's next matchday lineup will show how the club reallocates midfield minutes over the closing weeks of the regular season.