Have something/a lot on the ball
Definition 1 of 1
Pro Tip 1/3Informal Use
This phrase is casual, suited for everyday conversation rather than formal writing or speeches. 
Despite his casual attire, Mike has a lot on the ball.
Pro Tip 2/3Positive Impression
Using it conveys admiration or respect for someone's abilities or intelligence. 
Our new teacher really has something on the ball; her lessons are fascinating.
Pro Tip 3/3American English
More common in American English, might not be well understood in other English-speaking regions. 
He moved to New York and showed he had a lot on the ball.