SANTA CLARA — Day 1 brought a defensive end. Day 2, three more defenders. Day 3 opened Saturday with … the drafting of another reinforcement to the 49ers’ once-gutted defense.

Defensive tackle C.J. West was taken with the 113th pick — 11 spots into Saturday’s fourth round.

The only other draft in 49ers’ history that their first five picks brought only defensive players: 1981, starting with Hall of Famer Ronnie Lott en route to their first Super Bowl-winning season.

“My bread and butter is at the 1-technique. That’s where I just abuse centers, punch ’em in the face, be as violent as possible, and just cause havoc down there in the middle,” West said on a video conference call with 49ers reporters.

Defensive players came with all four of the 49ers’ picks the previous two days: defensive end Mykel Williams (first round, 11th overall), defensive tackle Alfred Collins (second round, No. 43), linebacker Nick Martin (third round, No. 75) and cornerback Upton Stout (third round, No. 100).

West (6-foot-1, 316 pounds) transferred to Indiana last year after four seasons at Kent State. He and Collins help fill the interior’s void created by last month’s release of Javon Hargrave and Maliek Collins.

“Me transferring was to put everybody on notice that I can do what I do at every level, to show everybody I’m a player, I’m a dog and I’m violent when I play football,” West said. “I just love this game and give it my full effort.”

West models his game after a combination of NFL veterans such as Collins, Anthony Adams, Grady Jarrett, and Aaron Donald.

The 49ers entered Saturday with seven picks, those being in the fourth round (Nos. 113, 138), fifth round (Nos. 147, 160) and seventh round (Nos. 227, 249, 252).

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