McMichael tied the score 2-2 when he beat Hofer far side from the left circle at 16:55 of the second period.
Holloway put the Blues ahead 3-2 when he deflected Ryan Suter’s pass from the point past Lindgren at 17:23.
Parayko made it 4-2 when he controlled a loose puck during a scramble in front of Lindgren and scored from the left post at 17:58.
“It killed us,” McMichael said. “Any time you fight back in a game and tie it up, you can’t allow two quick ones like that, especially the shift right after. So, we’ve got stuff to clean up and then we’ll be better Saturday [against Tampa Bay].”
Neighbours scored into the empty net at 18:05 of the third period for the 5-2 final.
“It feels good, but most importantly it's the way we're doing it,” Blues coach Jim Montgomery said. “We're in control of games right now, these three wins, and we've got to keep it up. We've got to stay with the process.”
NOTES: Schenn played 15:39 and was plus-3 in his 1,000th NHL game. The Blues are 4-1-1 in their past six games in Washington. … Blues center Robert Thomas (assist) extended his point streak to nine games (12 points; four goals, eight assists). … Capitals forward Tom Wilson (illness) was a late scratch. Carbery said he thinks Wilson will be play on Saturday. ... Dubois has recorded seven points (two goals, five assists) in his past five games.