Eagles waived WR Ronald Johnson, LBs Marcus Dowtin and Ryan Rau, and CB Chris Hawkins.

Johnson was drafted by the 49ers in the sixth round of the 2011 draft. He spent the 2011 campaign on Philly's practice squad, and he missed all of 2012 with a broken ankle. Rau made three tackles in four games last season. Dowtin and Hawkins have appeared in games for the Jets and Titans respectively.

Eagles WR Ron Johnson has been diagnosed with a dislocated left ankle, and likely break.

The injury should end Johnson's season. A sixth-round pick of the 49ers last season, Johnson was released at final cuts. He spent the year on the Eagles' practice squad before being added to the active roster for Week 17. He should be back as a camp body next summer.

Eagles WR Ronald Johnson was carted off the practice field with a "gruesome" leg injury Monday.

Per beat writer Jeff McLane, Johnson's ankle could be heard "cracking" from the sideline. We typically wait for more details before reporting on training camp injuries, but it doesn't sound like there's any chance Johnson's injury isn't severe. The 2011 sixth-round pick is almost certainly headed to injured reserve.

Eagles promoted WR Ronald Johnson from the practice squad.

A sixth-round rookie out of USC, Johnson was among the 49ers' final cuts. Undersized at 5-foot-11, 199 pounds, his NFL future is likely on special teams.

According to CSN Bay Area's Matt Maiocco, sixth-rounder Ronald Johnson is "perhaps the most-impressive looking of the wideouts" early in camp.

Similar to Steve Smith coming out of USC, Johnson uses his initial quickness to gain separation in the slot. He's more slightly built, though, with a checkered injury history. Johnson will battle Ted Ginn for the No. 3 receiver role. He's a longshot for fantasy relevance in redraft leagues.

49ers signed sixth-round WR Ronald Johnson to a four-year contract.