Lott's first curling success came with representing Manitoba at the 2011 Canada Winter Games, where he won a bronze medal, playing third for the team, which was skipped by Kyle Doering.

There, the team posted a 9-3 round robin record, won a tiebreaker, and then settled for the bronze medal, after losing to Northern Ontario in the semifinal.

On the World Curling Tour, Team Dunstone won the 2015 Bernick's Miller Lite Open.

The team played in three Grand Slam events that season, making it to the quarterfinals of the 2017 Tour Challenge.

After the season, Simmons retired from competitive curling and was replaced as skip by Tanner Lott.

They represented Canada in the 2018–19 Curling World Cup third leg, winning the event against Norway's Kristin Skaslien and Thomas Ulsrud.