5 bubble-watch players who make the 49ers’ 53-man roster

May 5, 2017; Santa Clara, CA, USA; San Francisco 49ers defensive lineman Noble Nwachukwu (64) and defensive lineman Villami Latu (92) and defensive lineman James Duberg (90) and defensive lineman Jamar Simpkins (93) wait for a drill during the 49ers Rookie Minicamp. Mandatory Credit: Stan Szeto-USA TODAY Sports
May 5, 2017; Santa Clara, CA, USA; San Francisco 49ers defensive lineman Noble Nwachukwu (64) and defensive lineman Villami Latu (92) and defensive lineman James Duberg (90) and defensive lineman Jamar Simpkins (93) wait for a drill during the 49ers Rookie Minicamp. Mandatory Credit: Stan Szeto-USA TODAY Sports /
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Sep 25, 2016; Seattle, WA, USA; San Francisco 49ers linebacker Shayne Skov (56) walks on the sidelines during the fourth quarter against the Seattle Seahawks at CenturyLink Field. Seattle defeated San Francisco, 37-18. Mandatory Credit: Joe Nicholson-USA TODAY Sports
Sep 25, 2016; Seattle, WA, USA; San Francisco 49ers linebacker Shayne Skov (56) walks on the sidelines during the fourth quarter against the Seattle Seahawks at CenturyLink Field. Seattle defeated San Francisco, 37-18. Mandatory Credit: Joe Nicholson-USA TODAY Sports /

No. 4: Cornerback Keith Reaser

Cornerback Keith Reaser is another holdover from the Trent Baalke era.

As a 2014 fifth round pick, Reaser has ideal size (6-foot-0, 190 pounds), track-star speed and has opened some eyes after impressing during OTAs.

With rookie Ahkello Whitherspoon still trying to find his way, Reaser and fellow cornerback Dontae Johnson have been seeing quite a bit of action so far during minicamps.

Reaser has all the physical tools to win the starting job across the field from fellow cornerback Rashard Robinson, and Reaser’s confidence seems to be growing with each passing day.

While Witherspoon, Will Redmond and K’Waun Williams had previously garnered more attention, it is Reaser who seems to be stepping up and letting his play speak for itself.

Robinson seems to be the consensus starter at one of the cornerback positions. And while Witherspoon may eventually be moving into a starting role, the competition is wide open for the second cornerback position.

If Reaser continues his impressive play, and Johnson continues to struggle, look for Reaser to be the Week 1 starter against Carolina.