It's a busy time of the year at the WWE Performance Center, with lots going on in the first quarter of the year. They've had some interesting guests drop by as well.

The Undertaker has been at the WWE Performance Center of late, presumably to prepare for his upcoming (and yet to be announced) WrestleMania match, though we can't confirm that's why he was there.

Mark Henry was also at the WWE Performance Center leading up to NXT Takeover: Portland, which shouldn't be considered much of a surprise considering that he was filmed for the video package to hype the Keith Lee vs. Dominik Dijakovic match.

In addition, we're told that former WWE Tag Team Champion Kenny Dykstra of the Spirit Squad also recently guest coached at the WWE PC. Now working under his real name of Kenn Doane, he's in ridiculous shape at 33, and has wrestled for both MLW and Beyond of late. He and Mike Mondo worked several dates for WWE in 2016.

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