Welker, 37, joins the 49ers after spending the previous two seasons (2017-18) as an offensive/special teams assistant with the Houston Texans.
Welker was hired by the Texans after a 12-year playing career with the San Diego Chargers (2004), Miami Dolphins (2004-06), New England Patriots (2007-12), Denver Broncos (2013-14) and St. Louis Rams (2015). He appeared in 175 games (102 starts) and registered 903 receptions for 9,924 yards and 50 touchdowns. On special teams, he returned 183 kickoffs for 4,138 yards (22.6 average) and one touchdown along with 264 punts for 2,584 yards. He also saw action in 13 postseason contests (11 starts) and added 88 receptions for 866 yards and five touchdowns. A four-time AP All-Pro [First-Team (2009 & 2011) & Second-Team (2007-08)] and five-time Pro Bowl (2009-13) selection, Welker appeared in three Super Bowls (XLII, XLVI & XLVIII) and registered 26 receptions for 247 yards. He either led the NFL or finished tied for the League lead in receptions three times in his career (2007, 2009 & 2011).