I’m starting all over with bass. I have just 1 nice new crank bait casting rod and reel and I fly fish but right now Im stuck with using my Lamiglas 9’4 fast action med steelhead rod. 
 

What are the cons of using the 9’4 besides weight? Can I continue using it for spinner baits, jerkbaits, I guess it will do for now!  Any suggestions on a good bass spinning rod under 100 bucks? Thank you 

I've had good luck with a Fenwick HMG spin rod. Lots of good rods in that price range now. Your steelhead rod may be awkward for bass. A lot of bass fishing is close in work. Short, accurate casting. Good luck

I don't have a 13Fishing bass rod, but I'm bowled over with my inshore 13Fishing Omen Green - it's the least expensive rod I fish, and I'll always have one in my ML niche. 

 

They have plenty of stock on the Fate Black bass rod, @Eric 26 has tried and recommended this rod, and it fits your price.  

https://13fishing.com/fate-black-3-spinning

If you can up the ante, Omen Black is a very good price for The entry level Toray graphite rod. 

 

Those long steelhead rods are great for casting, but you'll get a lot more feel and lure finesse from a lighter-weight 7' rod. 

Can you fish with the 9'-4"? Sure, its not the best tool due to steelhead rods being more parabolic so working a bass lure will be tough but I'm sure you can find a few techniques. I throw spoons and spinners for trout on rods of that length in the rivers. If my budget was $100 I would go after a St. Croix premier (probably on sale) or a tatula XT spinner. New model just came out at $99. Good luck!

I enjoy my HMG 6'6" spinning rod.I picked up the last gen HMG off of a discount site.

While I'm a St Croix guy, The HMG works well for me when I'm fishing in my Yak.

The HMG and any Diawa Lt under a 100 would work for anyone getting back into Bass fishing.

I will say I’m extremely pleased with my 13 fishing fate black (7’-1”) med light. I really like the fact the handle is shorter than most. The guides are straight and the wraps are well done. It’s also light in hand and very comfortable. As @bulldog1935 said I’m happy enough with this line next time I would up the budget for a Omen Black. As far as a all around spinning rod I would definitely recommend the med power in the Fate Black lineup.

In your budget range (from bottom to top) I would recommend the Berkley Lightning Rod at $34.99, the Daiwa AirdX at $50, or the Daiwa RG spinning rod at $99. I have alao found that I like the Academy Ethos series of rods and you can typically pick up the Ethos HD for $79 or less if on sale.

 

I agree with the Daiwa Revros, Regal LT, or Fuego as nice spinning reels ranging from $49 - $99. I've got all of them and they are all pretty smooth for the money. Daiwa Revros reel on a AirdX is a pretty decent little setup for around $100 with tax

If you have a Scheels near by, check them out...they have Scheels branded rod-n-reel combinations that look pretty solid.