As a post player you really can't ever get enough footwork and hand eye coordination training. So much of finishing in the post comes down to having great footwork and soft hands around the basket. Foot up drills are great for any position, but primarily they are for developing post players.
This footwork and agility drill is going to be very reminiscent to something a soccer player would do with using your feet to move the basketball from side to side. Adding in the added difficulty of catching and tossing a tennis ball at the same time will really help the player develop their hands as well.
Drill Name: Side Pull Foot Ups Tennis Ball Drill
Drill Goal: Work on footwork, quick feet, and hand eye coordination.
Equipment Needed: 1 basketball, 2 tennis balls, and 1 partner.
Tips: Do your best to not let your heels touch the ground, stay light on your feet the whole time. The passer should do a good job of making the player have to reach high and low to catch the tennis balls.
Directions: The player is going to start with their right foot on the ball and the passer will face the player 4-5 feet away with two tennis balls. When the drill starts the player will begin to hop to their right and as they do bring the basketball with them by slightly tapping it to the right with the bottom of their foot. As they are sliding the passer will toss tennis balls back and forth with the player. At anytime the passer can call out "switch" or "change" and the player must switch which foot is up on the ball and start sliding the opposite direction. Continue this drill for 30-60 seconds.