They need to take him this year if someone worthy is there at #23

If someone they think is worthy for future LT at 23, this is the year to take him.
Whoever it is will do much better with a full year under his belt rather than being thrown to the wolves as a rookie. Tough going.

But, if nobody there, then they may be forced to do something in 2019. Never the best position to be in because you tend to overreach to fill a need.