Predicting the San Francisco 49ers Starting Lineup in 2017

Oct 2, 2016; Santa Clara, CA, USA; San Francisco 49ers running back Carlos Hyde (28) warms up prior to the game against the Dallas Cowboys at Levi's Stadium. Mandatory Credit: Kelvin Kuo-USA TODAY Sports
Oct 2, 2016; Santa Clara, CA, USA; San Francisco 49ers running back Carlos Hyde (28) warms up prior to the game against the Dallas Cowboys at Levi's Stadium. Mandatory Credit: Kelvin Kuo-USA TODAY Sports /
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Oct 2, 2016; Santa Clara, CA, USA; San Francisco 49ers defensive lineman DeForest Buckner (99) warms up prior to the game against the Dallas Cowboys at Levi's Stadium. Mandatory Credit: Kelvin Kuo-USA TODAY Sports
Oct 2, 2016; Santa Clara, CA, USA; San Francisco 49ers defensive lineman DeForest Buckner (99) warms up prior to the game against the Dallas Cowboys at Levi’s Stadium. Mandatory Credit: Kelvin Kuo-USA TODAY Sports /

Defensive Line

Young defensive ends DeForest Buckner and Arik Armstead aren’t going anywhere, so they should assume to be starters along the defensive line, if the 49ers maintain a 3-4 defense or switch to a 4-3.

Armstead (shoulder) is out for the season, and the injury likely hampered his less-than-stellar efforts against the run.

Assuming a fully healthy Armstead returns to poise in 2017, he’ll bookend the D-line opposite Buckner. The only question is who occupies the middle.

Veteran defensive tackle Glenn Dorsey has adequately filled this void, taking over for a largely ineffective Mike Purcell. Although the team sure wishes former-49ers nose tackle Ian Williams (ankle) was healthy enough.

Williams could come back, and Dorsey is a free agent next year.

Let’s go with a bolder prediction of the Niners re-signing a (hopefully) healthy Williams to help stop the run.

Meanwhile, defensive tackle Quinton Dial is about as good a reserve option as the team could have.

Defensive Ends: Arik Armstead, DeForest Buckner

Defensive Tackle: Ian Williams (Quinton Dial if a 4-3 is introduced)