The 49ers are not exercising fifth-year option on left guard Laken Tomlinson, Matt Maiocco of NBC Sports Bay Area tweets. However, he adds that the team still views him as a starter. With that in mind, the Niners will try to keep him around on a deal that will cost less than the $9.6M option. 
Tomlinson, 26, was made the No. 28 pick in the 2015 draft by the Lions. He started the first two years of his career at left guard for the Lions and served in the same capacity for the Niners after coming over in a trade last summer. Tomlinson missed the 2017 season opener, but played in the next 15 games.
Last year, Tomlinson earned the best marks of his career from Pro Football Focus. He graded out as the league’s No. 32 ranked guard, per PFF, which shows that he is clearly a starting caliber player. Still, the Niners believe that they can lock him up at a lesser rate going forward.
For now, he’s under contract for one more season as a part of an overhauled Niners offensive line. The Niners project to start three newcomers – guard Jonathan Cooper, center Weston Richburg, and first-round tackle Mike McGlinchey – along with Tomlinson and left tackle Joe Staley.