SANTA CLARA -- The missing pieces to the 49ers’ offensive line are beginning to reappear.
Alex Boone is expected to end his months-long contract holdout Monday after he and the team compromised on the remaining years of the right guard’s deal.
According to a league source, the 49ers agreed to convert the incentives Boone could have earned into base salary. He now stands to make $6 million over the next two seasons.
The team also waived the fines that had piled up in Boone’s absence, which began with a mandatory minicamp in June, and it agreed not to give him the franchise tag when his contract ends after the 2015 season.
The 49ers perhaps signaled a deal with Boone was near Saturday when only six healthy offensive linemen made their 53-man squad. One of those linemen, undrafted rookie Dillon Farrell, could be released to make room for Boone, who does not count against the 53-man roster until he signs. Farrell presumably would be a candidate for the practice squad.
But the 49ers could wait until Tuesday to officially bring back Boone. That’s the day the team can move injured nose tackle Glenn Dorsey from the active roster to injured reserve with a designation to return in the second half of the season.
It’s unknown whether Boone or fill-in Joe Looney will start at right guard in Sunday’s opener in Dallas, or whether right tackle Anthony Davis, who missed the offseason after shoulder surgery, is ready to start at his spot.
Both are expected to take over their former roles at some point early in the season.
That would make Looney the No. 1 backup at guard and Jonathan Martin the top reserve at tackle. The team expects rookie center Marcus Martin to return from a knee injury in five or six weeks.
Practice squad started – The 49ers began building their 10-man practice squad, but they lost at least three players they had hoped to retain.
Running back Glenn Winston, whose hard-charging style impressed coaches and teammates, was claimed off waivers by the Browns. Cleveland also claimed offensive lineman Ryan Seymour.
Cornerback Darryl Morris – who played in 16 games as a rookie last season, mostly on special teams – was claimed by the Texans.
In addition, longtime special teams ace C.J. Spillman was signed by the Cowboys, who will host the 49ers in six days.
Instead, the 49ers practice squad has offensive linemen Carter Bykowski and John Fullington, wide receiver Lance Lewis, tight end Asante Cleveland (Christian Brothers High School), defensive linemen Mike Purcell and Lawrence Okoye, and linebackers Shayne Skov and Chase Thomas.
The 49ers still have two open spots, one of which presumably will be used on a running back.
Bethel-Thompson to New England –The Patriots signed former Sacramento State quarterback McLeod Bethel-Thompson to their practice squad.
Read Matt Barrows’ blogs and archives at www.sacbee.com/sf49ers.