Kyle Shanahan: Isaac Guerendo has been a long shot all week

Reporting emerged earlier on Thursday noting that 49ers running back Isaac Guerendo is unlikely to play in Sunday's game against the Dolphins due to a hamstring injury. Head coach Kyle Shanahan confirmed that reporting during a Thursday interview with KNBR. "I haven't talked to the trainers yet to officially rule him out, but it's been a long shot all week, and I'm sure that'll most likely be the case tomorrow," Shanahan said, via David Bonilla of 49erswebzone.com.That puts Patrick Taylor in line to start at running back for the 49ers, who have also seen Christian McCaffrey and Jordan Mason go down at the position in recent weeks.Guerendo officially did not participate in Thursday's practice.Defensive end Nick Bosa (hip, oblique) was downgraded to a non-participant on Thursday after he was limited on Wednesday.Offensive tackle Trent Williams (ankle) and Malik Collins (illness) remained out of practice.Linebacker Dre Greenlaw (Achilles, knee), offensive lineman Jaylon Moore (hip), safety Malik Mustapha (chest), and offensive lineman Nick Zakelj (illness) remained limited.Safety Talanoa Hufanga (wrist), linebacker Dee Winters (neck), offensive lineman Aaron Banks (elbow), safety...