Lucky, That's a tough one. Great drawing BTW!
It appears this is a basement, making an exterior wall alteration impossible. There is however an easy fix for the lally column obstruction.
If the basement ceiling is "finished," this solution would be a bitch, but still possible Hoping it's not, here's the ultimate solution:
Simply remove the lally-column and orient the table 90 degrees from "as drawn" - and center it in the "new" expanded space!
The lally column removal would involve installing an "pocket beam" to take the load now held by the lally-column. This is accomplished (and I've done this on two separate occasions) by first supporting the floor above, cutting out a "pocket" (space) within the floor joists - wide enough to be able to insert a new beam into the cut away void. Use TECO brackets to nail the joists to the new transverse beam and voila - no more lally-column!
Typically, floor joists that span 12 feet, which is what your drawing appears to show (at the lally-column traversing point) would be minimally 2x8's. Buy taking 4, 2x8's (or 10's, if THAT's the joist dimension) together, and a fletch plate (a piece of 1/2" thick steel, 7" high and 12' long) can be sandwiched in between the 2x8/10's and the load born by the lally-column, could be transferred to the perimeter wall(s) - rather than into the middle of the space!
You secure the steel "sandwich" by drilling staggered holes thru the entire assembly and using 1/2" carriage bolts securing the four 2x8/10's and steel fletch plate as a single unit.
Of course the local lumber yard could also design a simple micro-lam, order it for you and then have a carpenter install it. Either way, the lally column issue is laid to rest and you get one helluva nice pool room ;-)
Here's a link for the hangers I mentioned on amazon.com. They run about 2-bucks a pop. Assuming your joists are 16" on-center, you'd need maybe 10: http://amzn.to/2Dt4qJh
The 4-2x8/10's might run 100 and the steel flitch plate and bolts to assembly the beam might run another 200.
The only problem you might incur is any wiring, plumbing pipes or heating pipes that run thru the new beam zone.
They'd have to be re-worked and if significant in numbers and complexity, become a deal breaker...
If your dead serious about having a 9-footer - and playing more than once a month, this solution is not an option. It is your only reasonable option.
4-foot sticks is NOT!