Good catch RD. Saw it listed for Capfriendly after you mentioned it.
I'm not sure if this is a paper transaction or whether they sent him down to get in some game action. There are 4 games this week for Stockton, Mon, Wed, Fri and Sat. A lot of it depends on Kylington's status. If he is good to go, then they can send down Mackey. If not, they need to decide if they want to waive one of the extra forwards to clear a spot for him or just proceed as is.
Ritchie was fine in the last game, brought hitting that managed to create some havoc, but didn't really provide any scoring chances. Considering that Ruzie was fully rested, it was an odd choice. But you know that Sutter is goinbg to be hard on rookies.