and he streams D&D?

Indee-n-deed! Ha ha ha. Yes, every other Wednesday at 2 PM Eastern, Mike teams up with fellow podcasters Gabriel Urbina, Beth Eyre, and Emma Sherr-Ziarko for 20 to Midnight, a D&D 5e stream where heroes must race against the clock to save the world. Currently, he is playing the role of a bard with a flair for the performing arts.
You can watch the stream on Twitch, you can watch replays of the streams on YouTube, and you can learn more about the show and how to support it on 20toMidnight's website.
and he's done improv?

Yes (and)! Starting with Spontaneous Combustion at Rice University, Mike has been performing improv comedy since 2013. Mike was a founding member of San Francisco's Efficient Office Practices, a player for CSz Houston and CSz Seattle, and a founding member of Cinnamon Sherbert. In Seattle, Mike performed in three productions with Jet City Improv: A Tribe Called Yes, Nancy You, and ShotProv.
A Tribe Called Yes (pictured left) is an improvised play about the rise and fall of a hip-hop group. Each performance features battle raps, group songs, and solo tracks all made up on the spot. You can watch a video of the sold-out opening night performance here.
and sketch comedy?
Occasionally, yes! Here's a recent sketch, Breakfast in Pallet Town, originally performed at CSz Seattle as part of Something Great. Mike then developed this sketch for video with the help of Daniel Kinamon and Sam Kirkpatrick.