That was the word Monday from ESPN's Adam Schefter.
Those names make sense for Seattle.
Bush would qualify as the power-oriented backup Seattle has sought for Marshawn Lynch. Bush played for Seahawks' offensive line coach Tom Cable in Oakland, so he would come to the Seahawks already versed in the team's blocking schemes.
Lynch is the clear starter, with Leon Washington providing a change-of-pace element. Justin Forsett, though valuable in the past, became a bit redundant with Washington on the roster. Adding a second power back would allow the Seahawks to run their normal offense if something happened to Lynch. The team would have to adjust its plans considerably if Washington and Forsett were the only viable alternatives, as the case was during a defeat at Cleveland last season.
Forsett is an unrestricted free agent.
At tight end, the Seahawks need depth after losing John Carlson to Minnesota in free agency. Shiancoe played under Seahawks' offensive coordinator Darrell Bevell in Minnesota. Seahawks quarterback Tarvaris Jackson was also with the Vikings at that time.
Tamme spent his first four NFL seasons with Indianapolis, peaking with 67 receptions for 631 yards and four touchdowns in 2010.
Update: Schefter cites another source saying a Bush visit has not been scheduled, but the Seahawks are very interested in lining up one.