Bishop played in two games for the 49ers last season after beginning the year with the Cardinals. After losing both Patrick Willis and Chris Borland to retirement, the team is looking for linebackers.
Over his eight-year NFL career, the 30-year-old has 299 total tackles, nine sacks, nine passes defensed, one interception and eight forced fumbles.
Tillman signed a one-year, $4.315 million deal in January to avoid arbitration and the discussions for a new deal are still considered preliminary, according to the report.
Tillman posted a 13-6 record in 2014 with a 3.34 ERA in 34 starts.
"If I'm there, hopefully it's a good situation, whether it's long or short," Ryan said. "For them to have enough confidence in me to go into Spring Training as a reliever, and actually for them to believe that I might be able to make the team as a reliever, that makes me proud."
Ryan has given up seven runs on seven hits in 11 innings of work this spring.
"When he throws it right, it's good," Ausmus said of Krol. "He has a tendency to occasionally slow his arm down on his cutter and curveball. He did it a couple times today. But when he doesn't slow his arm down, it's very good."
Middleton also added three assists and two steals.
|2014-15 Team Leaders|
|Full Team Statistics|