These lines don't look a day older than 150

NFC West teams should have few age issues on their offensive lines.

San Francisco, Seattle and St. Louis have combined to use five first-round picks for offensive linemen in the last five drafts. Those teams have combined to draft five more in the second and third rounds over the same period.

The remaining 29 teams, including division-rival Arizona, have drafted fewer in those rounds on average.

Enough prelude already. After reading Kevin Seifert's post spinning off John Clayton's theory -- that a starting line tends to decline sharply when its combined age reaches 150 years -- there was no way I could resist a perfectly legit excuse to crunch numbers. The occasion even allowed me to break out ages to the tenth, a rare treat.

The chart shows NFC West offensive lines landing on the preferred side of 150. The numbers reflect ages for starting lines as their teams generally might want to see them come together.

Rookie Bobby Massie would be at right tackle for Arizona. Alex Boone would be at right guard for San Francisco. I plugged in Quinn Ojinnaka as the left guard in St. Louis. And for Seattle, I went with James Carpenter at left guard even though his surgically repaired knee will not be ready in time for the season opener. Breno Giacomini was the Seahawks' right tackle, with John Moffitt at right guard.

Whoa, gotta run. The 49ers are beginning their minicamp practice, so I'd better get out to the field. Their offensive line will be a few hours older by the time I return with post-practice observations.

NFC West Projected Starting OL Ages