The San Francisco 49ers are preparing for their Week 13 contest against the Seattle Seahawks on Sunday at CenturyLink Field in Seattle, Washington.

The 49ers will be without their starting receivers on Sunday. Head coach Kyle Shanahan said on Friday morning that he didn't expect Marquise Goodwin or Pierre Garçon to be available in Seattle. Both have been ruled out against the Seahawks.

Goodwin remains excused for personal reasons. He missed this past Sunday's game against the Tampa Bay Buccaneers.

"(Goodwin is dealing with) family concerns and things like that," Shanahan told reporters on Friday afternoon. "Real stuff and he's having a real tough time with it, which is understandably so. He tried to come in yesterday and came to a meeting. I met with him after and we talked for a while, and he just didn't seem like he was in a good spot.

"I thought it would be better for him to go be with his family right now. He agreed, and we'll reassess after the game, and where we go next week."

Garçon also missed Sunday's game due to the knee injury he has been dealing with for most of the season. Shanahan repeated some of the things he said about Garçon earlier Friday morning.

"I don't see it getting a lot better right now," Shanahan said. "We haven't had to put him on IR in the situations we're in. We just haven't been forced to.

"With Marquise being down and stuff, and seeing how the rest of this year goes, he's there if we need him. He'd have to battle through some stuff, but it's been very tough for him to practice and things like that. Without him practicing these number of weeks, I just don't think it's right to put him in the game."

Shanahan said that activating Steven Dunbar from the practice squad to add a fifth receiver isn't an option.

"Dunbar pulled his hamstring in practice last week, so he's not an option," Shanahan revealed. "We still have [Victor Bolden]."

Below are the official injury reports for the 49ers and Seahawks. Also included are Friday's practice participation reports, which were provided by the 49ers Communications staff.

San Francisco 49ers

WR Pierre Garçon (knee), G Joshua Garnett (thumb), WR Marquise Goodwin (not injury related), S D.J. Reed (heel, chest)

Seattle Seahawks

RB C.J. Prosise (abdomen), LB K.J. Wright (knee)

S Shalom Luani (quadricep), RB Tre Madden (chest)

DT Shamar Stephen (foot)

San Francisco 49ers Friday Practice

Did Not Participate In Practice
WR Marquise Goodwin (not injury related), S D.J. Reed (heel, chest)

Limited Participation in Practice
WR Pierre Garçon (knee), G Joshua Garnett (thumb), S Jaquiski Tartt (shoulder)

Full Participation in Practice
DE Arik Armstead (back), RB Matt Breida (ankle), CB Greg Mabin (thigh), DT Earl Mitchell (not injury related), LB Mark Nzeocha (thigh), C Weston Richburg (knee), LB Malcolm Smith (Achilles), T Joe Staley (not injury related)

Seattle Seahawks Friday Practice

Did Not Participate In Practice
SS Shalom Luani (quadriceps), FB Tre Madden (chest), RB C.J. Prosise (abdomen), LB K.J. Wright (knee)

Full Participation in Practice
WR Doug Baldwin (groin), T Duane Brown (not injury related), RB Chris Carson (not injury related), G/T D.J. Fluker (knee), DE Dion Jordan (not injury related), FS Bradley McDougald (shoulder), DT Shamar Stephen (foot)