Joseph was traded to the Penguins from the Blues on Wednesday in exchange for future considerations.
This trade could signal Nick Leddy (lower body) is nearing a return, which will require the Blues to clear a roster spot. On the Penguins' side of things, the organization gets a player back that is familiar -- Joseph logged 147 games over parts of four seasons with Pittsburgh, producing a total of 37 points. He'll compete with Ryan Shea and Ryan Graves for playing time.