Felix Doubront has had quite the roller coaster season. He’s been able to go from wildly out of control to poised and collected even within the same game at times.

Working with a 5.44 ERA and a 3-2 record, the left-hander recently did some work in the bullpen with Red Sox pitching coach Juan Nieves, focusing on Doubront’s arm speed and finish through the strike zone. Doubront’s delivery is still a work in progress, but manager John Farrell thinks Doubront is trending in the right direction.

Hear more from Farrell in the video above, or check it out on NESN’s YouTube channel.