See below for detailed player biographies of the signed players:
Burford (6-4, 300) was selected by the 49ers in the fourth round (134th overall) of this year’s NFL Draft out of Texas-San Antonio. He appeared in 45 games (43 starts) in four years (2018-21) at Texas-San Antonio. As a senior in 2021, started all 12 games and helped pave the way for school records in total yds. (6,146), passing yds. (3,577) and points scored (516). As a junior in 2020, was named Second-Team All-Conference USA after appearing in 11 games (10 starts) and helping block for a program-best 2,585 rushing yds. Appeared in all 12 games (11 starts) as a sophomore in 2019 and was named All-Conference USA Honorable Mention. As a freshman in 2018, started all 10 games he appeared in.
A 21-year-old native of San Antonio, TX, Burford attended Wagner (San Antonio, TX) High School.
Castro-Fields (6-1, 197) was the third of three sixth-round draft picks (221th overall) selected by the 49ers in this year’s draft out of Penn State. He appeared in 51 games in five years (2017-21) at Penn State and tallied 138 tackles, 10.0 TFLs, 28 PDs, 3 INTs and 1 FF. As a senior in 2021, appeared in 11 games and registered 32 tackles and 6 PDs. In 2020, played in 3 games and posted 12 tackles and 1 PD. Appeared in all 12 games as a junior in 2019 and recorded a career-high 52 tackles, 10 PDs, 3.0 TFLs and 2 INTs. As a sophomore in 2018, appeared in all 13 games and notched 32 tackles, 7 PDs, 5.0 TFLs and 1.0 sack. As a freshman in 2017, played in 12 games and registered 10 tackles, 4 PDs, 2.0 TFLs, 1 INT and 1 FF.
A 23-year-old native of Upper Marlboro, MD, Castro-Fields attended Riverdale Baptist (Upper Marlboro, MD) High School.
Davis (6-2, 310) was the second of three sixth-round draft picks (220th overall) selected by the 49ers in this year’s draft out of Central Florida. He appeared in 28 games (14 starts) in five years (2017-21) at Central Florida and registered 61 tackles, 11.0 tackles for loss, 3.0 sacks, 2 PDs,…