The Colts signed Galbreath to a contract Friday.
Coach Mike Macdonald said Bobo sustained a "serious" knee injury in Friday's joint practice with the Titans, Adam Schefter of ESPN reports.
Allen made his Colts practice debut in Thursday's joint practice with the Falcons, Noah Compton of SI.com reports.
Downs is excited to play alongside veteran wide receiver Keenan Allen, whom the Colts signed to a one-year contract Monday, Paul Bretl of USA Today Colts Wire reports.
Warren (groin) is expected to miss about a week, but his status for Week 1 against the Ravens isn't in any danger, Ian Rapoport of ESPN and NFL Network reports.
Warren (groin) suffered a strained abductor in Wednesday's practice but is expected to return to practice next week, NFL reporter Jordan Schultz reports.
The Seahawks are slated to sign Diggs to a one-year deal, Adam Schefter of ESPN reports.
Giddens (hamstring) participated in Wednesday's practice, Nathan Brown of The Indianapolis Star reports.
Coach Shane Steichen told Kevin Bowen of 107.5 The Fan Indianapolis on Wednesday that Pierce (ankle) is "in a great spot right now. ... Hopefully, we will have him back soon."
Coach Shane Steichen confirmed Warren suffered a groin injury during Wednesday's joint practice with the Falcons but provided no additional information, James Boyd of The Athletic reports.
