Former Dolphins offensive tackle Sam Young will sign with the 49ers on Monday, a source tells Ian Rapoport of NFL.com (on Twitter). The Niners just lost fellow tackle Shon Coleman to injured reserve, so Young should be able to step in and fill a major need for the team. 
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Young spent the last three seasons with the Dolphins and has also played for the Bills and Jaguars. Over the years, the 2010 Cowboys sixth-round pick has appeared in 88 games with 21 starts in those contests. Prior to joining Miami, Young also drew attention from the Saints, Jets, and Bills.
The 49ers project to start Joe Staley and Mike McGlinchey on the outside of the line with sixth-round rookie Justin Skule, Willie Beavers, Najee Toran, and Ross Reynolds also in the mix for reserve roles.
Beavers was horrible on Saturday against the Cowboys….three holding penalties in about 10 plays