I was going through NFL teams to see where they drafted last year's starters on the O line. I got through 5 teams and stopped.....because:
Bills 2nd round, 2nd, 3rd, 4th, UDFA
Miami 6th, 1st, 1st*, 2nd* 4th* ..... *3 rookies....and they went 10-6
NEng 1st, 3rd, UDFA, 4th, 6th* ...... *rookie
Tennesse 6th, 2nd (Saffold), 4th, 3rd, 5th (1st rounder Taylor Lewan started 5 games and was injured) They went 11-5
So you don't have to draft OL high to be successful. AND.....you can start a rookie or multiple rookies and be successful (Miami)
Okay so I just did the playoff teams (14 @ 5 = 70)
KC : 1st Rd, 7th, 7th, UDFA, UDFA
Buffalo: 2nd Rd, 2nd, 3rd, 4th, UDFA
Tenn: 6th Rd, 2nd, 4th, 3rd, 5th
Cleve: 1st Rd, 2nd, 4th, 5th, 1st
Pitt: UDFA, UDFA, 1st, 1st, 3rd
Baltimore: 3rd Rd, 6th, UDFA, 4th, 1st
Indy: 1st Rd, 1st, 1st, 4th, 2nd
Tampa: 2nd Rd., 2nd, 6th, 3rd, 1st
GBay: 4th Rd, 2nd, 5th, UDFA, 3rd
Rams: 2nd Rd., 5th, 7th, 2nd, 2nd
Seattle: 1st Rd., 1st, 2nd, 3rd, 5th
NOrleans: 3rd, 1st, 2nd, 1st, 1st
Chicago: 7th, 2nd, 2nd, 1st, 4th
Wash: UDFA, 6th, 6th, 1st, 3rd
So, 4 teams had no 1st rounder on the OL. 5 had at least 2 for a total of 12 first rounders and the other 9 teams had 5 first rounders.
1st round = 17
2nd round = 15
3rd round = 9
4th round = 7
5th round = 5
6th round = 5
7th round = 4
UDFA = 8
32 were taken in the first 2 rounds and 38 were taken from the 3rd round down, including 8 UDFA's.