The Oakland Raiders add four assistants to their coaching staff on Tuesday.

Joining new coach Jack Del Rio are Bobby Johnson (tight ends), Rob Moore (wide receivers), Bernie Parmalee (running backs) and Tracy Smith (assistant special teams).

Johnson was with the Detroit Lions the past two seasons as the assistant offensive line coach (2014) and tight ends coach (2013). He previously worked for the Jacksonville Jaguars (2012) as tight ends coach and with the Buffalo Bulls (2010-11) as assistant offensive line coach.

Moore joins the Raiders after coaching receivers for the Bills in 2014 and at Syracuse University from 2010 to 2013. The 12-year NFL veteran played for the New York Jets and Arizona Cardinals and was named to the Pro Bowl twice. He finished his career with 628 receptions for 9,368 yards and 49 touchdowns.

Parmalee served as the Kansas City Chiefs’ tight ends coach from 2010 to 2012 and was a Miami Dolphins assistant from 2002 to 2004. He played in 134 career games for the Dolphins and New York Jets, compiling 2,179 yards rushing on 567 carries and 17 touchdowns along with 168 catches for 1,485 yards and three touchdowns.

Smith has worked for the San Francisco 49ers, Cleveland Browns and Seattle Seahawks, most recently as a 49ers special teams assistant from 2012 to 2014.