My catchers do this regularly. During our season there isn't much time for individual defense, so my catchers work on just about all of their skills other than blocking all while they get their arms loose. It includes getting the arm loose, long toss (not done every day, but 2 to 3 times a week), throwing with a purpose, and activity catch. This takes 11 minutes without long toss, 15 with long toss included. Here's what my guys get and know:
Catchers Throwing Routine
15 Minutes
:00-:04 Throw to Loosen: Find four seam grip; work on catching the ball without closing the glove/Transfer; Length should be at about 90 feet after 4 minutes.
:04-:08 Long Toss: Begin to increase distance of throws; Work on building strength in the arm; Lob one to partner, then fire two on a line, Repeat; Push yourself, increase your arm strength.
:09-:12 Throw with a Purpose: Playing catch while always making a play; Approximately 90 ft. apart; Throwing out runners trying to steal (work on footwork, transfer, and release).
:12-:15 Activity Catch: Working on a specific activity for the last three minutes. The activity will change each day (more than one can be worked on in a given day); Plays at plate/tags; picks; quick catch; Hand Transfer; Force plays at plate/Double plays through home
I know that there are things that I miss in this routine that catchers do and it doesn't make up for individual time that we do not get, but it helps teach better when I work with my guys while they are warming up every day. Our infielders and outfielders also have similar routines. The segments are labeled the same, but how the time of each segment is filled is position specific.