What happened: Alvas Powell came on for David Doudera in the 75th minute with the visiting side holding a 2-0 postseason lead.

Why it matters: The switch mirrors Powell's 69th-minute entry for Doudera on Oct. 22 while protecting a 2-1 margin. Powell has repeatedly been called upon in the closing stages to see out leads, including an 85th-minute appearance in a 3-1 match on Sept. 27 and a late sub role in a 2-0 match on Aug. 30.

What to watch: Fifteen minutes of regulation remain for the visitors to close out the two-goal road cushion.