Left wing Pat Maroon, who has been McDavid's regular left wing most of the season and does not have a point in the series, will move to a line with center Mark Letestu and right wing Zack Kassian.
"He's kind of like a Swiss army knife, he's played up and down the lineup on the power play, penalty kill, he plays all over the place," McDavid said of Caggiula after the morning skate Thursday. "He's a real good skater, very competitive, real good with the puck, someone I like playing with.
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"I think he's a good skater, he can skate with us. You'll miss Patty down low on the forecheck and all that, but Drake has some areas that are better, I guess."
Caggiula, who had 18 points (seven goals, 11 assists) in 60 regular-season games, said playing on McDavid's line means you always have to be alert.
"The puck can always be on your tape, and vice versa, he always wants the puck on his tape," Caggiula said. "You have to make sure to give him the puck when he wants it, especially when he's got the speed.
"He's done a good job of talking to me all season long. In situations like this where you're bumped up to his line, he's always been good about communicating with me, telling me different things of what he sees, and that helps a lot."
McDavid, the Art Ross Trophy winner with 100 points during the regular season, has two points in the series (one goal, one assist) and no points in the past two games. He has not gone more than two games without a point in his NHL career.
McDavid's line has faced tight checking from the Sharks and is almost always against the top defense pair of Marc-Edouard Vlasic and Justin Braun.