The Washington Redskins introduce their first-round draft pick, linebacker Ryan Kerrigan, from Purdue University, at Redskins Park. (John McDonnell/The Washington Post)

In another move aimed at upgrading their 31st-ranked defense, the Washington Redskins used the 41st pick of the NFL draft Friday night to select Clemson lineman Jarvis Jenkins.

The Redskins also had entered the draft’s second round with the 49th overall pick, but traded back three times to stockpile mid- to late-round picks. First they swapped that 49th pick with Indianapolis for the 53rd and 152nd (fifth round) selections, and then sent the 53rd pick to Chicago in exchange for the 62nd and 127th (fourth round) selections.

The Redskins then sent the 62nd pick to Miami and received the Dolphins’ 79th overall pick (a third-rounder), the 146th (a fifth-rounder) and the 217th (a seventh-rounder).

After entering the draft Thursday with a first- and second-round pick but none in the third and fourth rounds, Washington by virtue of four trades over two nights wound up with picks in every round.

Once they reached the third round, the Redskins made a move to help their offense, drafting University of Miami wide receiver Leonard Hankerson. The 6-foot-3, 209-pound Hankerson recorded 72 catches for 1,156 yards and 13 touchdowns last season. He will help bolster a receiving unit that is lacking in size, with both Santana Moss (who is a free agent) and Anthony Armstrong under 6 feet tall.

Many draft analysts ranked Hankerson as a second-round selection. He recorded the best statistical season by a Miami receiver and his 22 career touchdowns rank third all-time.

“I was very pleased with today,” Coach Mike Shanahan said after the Redsksins selected Hankerson. “At the beginning of the day we had targeted both of those players and to get both and also get multiple picks was really good.”

The Redskins will have 10 selections — a fourth-round pick, four fifth-rounders, a sixth-rounder and four seventh-rounders — on the final day of the draft Saturday.

Shanahan said Thursday night that the two second-round picks would give the Redskins flexibility if they wanted to move up in the second round or farther down in the draft to acquire additional picks and increase overall depth. Washington opted for the latter approach; if the team holds on to all those selections, it will have picks in every round for the first time since 1995.

The Redskins’ selection of Jenkins was their second move to bolster their defensive front in as many days. On Friday, they selected Purdue’s Ryan Kerrigan 16th overall to play outside linebacker opposite Brian Orakpo in their 3-4 defense.

The 6-foot-3, 309-pound Jenkins played defensive tackle for the Tigers, but also has the ability to play end in the 3-4, which is where the Redskins plan on using him.

“They told me they run a 3-4 defense under Mike Shanahan, and they told me I’m going to be a two-gap guy, and I can do that: two-gap or three,” Jenkins said. “I can get in and do whatever anybody asks me . . . I’m all about winning. I’ll sit there on two knees if that’s what they want me to do.”

Describing his strengths, Jenkins said: “I’m more of a run-stopper. I’m physical at the point of attack. I can take double-teams, and I can beat double-teams. I’ve been seeing them all through Clemson. I’ve got to work more on the pass-rush part. . . . I’m the kind of guy that does the dirty work.”

A three-year starter for the Tigers, Jenkins recorded 158 tackles (31 for losses, the most in Clemson history). He earned first-team all-ACC honors and was rated by ESPN as one of the top five defensive tackles in the draft. He has been praised for his leadership skills and possesses good quickness and nimble footwork.

Jenkins said he was expecting to be taken behind fellow Clemson lineman Da’Quan Bowers, but the phone rang with Bowers, who has dropped in the draft because of knee problems, still on the board.

“I was going outside to talk to my grandmama. My phone rang and I was thinking there would be a lot of noise and it was all calm. It was like ‘Jarvis, this is Mike Shanahan. We’re going to take you.’ ”

Jenkins will compete with defensive ends Adam Carriker, Kedric Golston, Phillip Daniels and Jeremy Jarmon for playing time, and also could challenge nose tackles Ma’ake Kemoeatu and Anthony Bryant.

Hours earlier, Kerrigan was introduced at the team’s headquarters in Ashburn, and described his selection by the Redskins as a “perfect fit.”

A four-year player at Purdue, Kerrigan, who tallied 33.5 sacks and 14 forced fumbles for the Boilermakers, interviewed with the Redskins both at the NFL Combine in February and again at Redskins Park earlier this month. He came away from those meetings hoping Washington would choose him.

“I just had a good couple of meetings with them and I really like what the coaches are doing with their defensive scheme,” Kerrigan said. “I fit very well in here, especially being opposite Brian Orakpo. I feel like it will be a good combination.”

In other second-round action, quarterbacks came off the board early Friday, just as they had in Thursday night’s opening round. The Cincinnati Bengals selected Texas Christian quarterback Andy Dalton with the third choice of the second round, and the San Francisco 49ers traded up to get Nevada’s Colin Kaepernick with the next selection. That meant that six quarterbacks were chosen in the first 36 picks of the draft. Four were taken in the first 12 choices on Thursday, but no other quarterbacks were selected in the opening round.

The New England Patriots chose Arkansas quarterback Ryan Mallett in the third round, with the 74th overall pick.

Bowers’s draft plummet ended when the Tampa Bay Buccaneers took him with the 19th choice of the second round, 51st overall. Bowers once was regarded as a likely first-round pick, but there were recent reports that teams were wary of the condition of his knee.

The second round began with the New England Patriots taking Virginia cornerback Ras-I Dowling. Among other players with local ties, Virginia Tech running back Ryan Williams (from Stonewell Jackson High in Manassas) was selected by the Arizona Cardinals with the sixth pick of the second round. North Carolina defensive tackle Marvin Austin, who played in high school for Coolidge and Ballou, was chosen by the New York Giants with the second round’s 20th choice. The Baltimore Ravens took Maryland wide receiver Torrey Smith with the second round’s 26th pick.

Staff writer Mark Maske contributed to this report.