It took the new 49ers regime less than four hours from the time of Tramaine Brock’s reported arrested on a domestic incident on Friday to his release from the team’s roster.
Now, as the 49ers get set to open their official offseason program on Monday in Santa Clara, Brock’s void on the preliminary depth chart stands as the team’s most-obvious hole.
The 49ers had NFL starters at every position. General manager John Lynch said he expected to use the draft to upgrade some spots. But, now, cornerback is a position without an obvious fall-back starter already available.
The offseason began with whispers the 49ers would look to extend Brock’s contract beyond the 2017 season. Now, Brock is gone and there is little proven experience remaining at the position.
Rashard Robinson, a second-year player, has more NFL starts at cornerback than anyone remaining on the 49ers’ roster. Robinson, a fourth-round draft pick last year, started eight of the 13 games in which he appeared as a rookie.
Robinson was the second cornerback that Trent Baalke selected in his final draft as 49ers general manager. In the third round, the 49ers drafted Will Redmond. Despite Baalke’s assertion that Redmond would be ready to play as a rookie, the ACL injury that ended his final season at Mississippi State kept him sideline for the entire season.
Dontae Johnson, a fourth-round pick in 2014, started six games in his first three seasons and never seemed to fully gain the confidence of any of the three 49ers coaching staffs for which he played.
Keith Reaser was a fifth-round pick in 2014. After missing his first season as he recovered from multiple ACL surgeries, he appeared in 28 games the past two seasons with no starts.
Newcomer K’Waun Williams had 10 starts with Cleveland in 2014 and ’15 as a nickel back, where he is a better fit than playing on the outside.
The 49ers last week visited with Ohio State cornerback Marshon Lattimore, who could be an option for the team to select with its first pick in this month’s draft.
The 49ers are scheduled to have the No. 2 overall pick, and cornerback is a position on which they might feel forced to spend an early draft pick.