Bernardo Fallas' Notes column has a note about the tinkering Arnsberg and Norris have been doing:
“I've been sloppy and getting behind the count and walking a lot of guys. (Thursday) the biggest thing for me was I didn't walk anybody...
...My arm slot has been really low. I've been letting the ball ride and getting a lot of movement on my fastball and not being able to control it. I've been staying back on my back leg and getting my arm up, and it's made a difference.”