Diego Pavia, Lardarius Webb Jr. head Ravens’ class of undrafted free agents

At the Baltimore Ravens’ rookie minicamp last year, the coaching staff got its first glimpse of four unheralded players who they’d learn plenty about in the coming months.The Ravens’ roster was touted as one of the deepest in the league, so there wasn’t expected to be much, if any, room for undrafted players. Yet, four months later, three members of the undrafted free-agent class, inside linebacker Jay Higgins, cornerback Keyon Martin and safety Reuben Lowery, made the regular-season roster. Martin did it after he initially wasn’t part of the team’s initial college free-agent class and needed a successful tryout at the rookie minicamp to stick.A fourth undrafted free agent, safety Keondre Jackson, ultimately was added to the 53-man roster around midseason and became one of the team’s most impactful special teams players.The Ravens take the undrafted free-agent process very seriously, and for good reason. They’ve repeatedly found gems who go on to become key players. At least one undrafted free agent has made the season-opening roster in 21 of the past 22 years.Who will it be this year? A look at the Ravens’ 19-player college free-agent class:The headlinersNick Dawkins, C, Penn State: Dawkins reunites with former Penn State teammate Vega