Or a baseball backstop.  Some have sections that progressively get lower.  You may find some that are 15' or so.  Don't throw INTO the field though.  lol.

Were talking bout PRACTICE!

2. tie the end of a rope to a garbage can lid, or something else flat.

3. toss it over and tie it off, you can lower and raise it.

4. practice by hitting the can lid with the weight.

Should be cheap, easy, adjustable, and will also help you with aim/consistency.

Jeremy Robinson wrote: http://imgur.com/a/b3EeU" rel="nofollow - This works pretty well.

THAT is very clever!!

Total cost about $30

1 x 4' 6"star picket (metal fencing post)

12'3" of 65mm PVC pile

6' of 20mm PVC pipe

1 4' x 1/2" bolt

mark 1' from the bottom of the star picket (thats your ground mark when you hammer it into the ground)

drill a hole through the star picket at 3' from your ground mark thats your locking hole.

65mm PVC is your upright.  Drill a 20mm hole at the 12' mark and fit the 20mm pvc into the hole extend an inch through the pipe thats your adjustable cross bar.

then repeat this same hole at the 11' and 10' mark (also lower if needed)

Then at 90 degree to the cross bar hole drill a small hole on the upright from the bottom at the 1' - 2' - and 3' position.  This lines up with the locking hole in the start picket

Hammer start picket into the ground to the mark. slide upright over the start picket and set at ground level.  with the cross bar in the 10' mark your cross bar is now set at 10'

start throwing

Using the bolt raise the upright up a foot and position it where the holes line up and put bolt through, bar now at 11'

repeat again bar now at 12 foot.

then by quickly taking down and adjusting the cross bar up the additional top holes you can get to 13, 14  foot.

if you need higher just start with a longer upright pole of PVC 65mm

Holes can be set at 6" intevals but not less as it weakens the PVC pipe

This is very very light. all pulls apart, cheap and easily transportable on most cars and roofrack type things or easy fit in small backyards.

hope its clear.

two - 2" pvc pipe cut exactly 6 feet each

two - 2" X 2" aluminum studs 9 or 10 feet long. Mark with sharpie line every foot

40 feet of light duty rope and one - 10 foot straight, light, electrical conduit (3/4")

2 carabiners attached to top of each stud (might have to drill holes)

two heavy duty spring clamps

slide 6 foot pipe overtop each

place metal stud in pipe making sure rope is threaded through conduit and carabiners at top first

raise stud to height required using sharpie foot measurements

Clamp stud at mark at top of 6' pipe so does not slide down into pipe

Tie rope to one clamp then hoist rope tight on other side or let conduit dangle level, and tie onto clamp 

Gets me a 9 - 14 foot uprights for practice and was cheap to build/salvage, is adjustable and easy to travel with.  Now if I only could throw those heights!!

Not to mention it is very possible to get the handle stuck on the fencing, so someone has to climb up to get it down. Done that a couple times.