Law: Julio Teheran's time in Braves rotation running out?

My first dispatch from my spring-training rounds, this one from the east coast of Florida ...

Julio Teheran had his worst velocity in 2018, averaging just under 90 mph on his fastball (per FanGraphs), so he enters this season as a major question for Atlanta, a player who has had a rotation spot for years but might no longer be one of the top five options. He started the Braves' game Sunday at the Marlins' stadium in Jupiter, Florida, and the signs from this outing weren't any better than they were coming out of 2018.