When I'm jabbing I often get countered by right hands. Sometimes my opponent lands a right cross after my jab lands, sometimes an overhand thrown by the opponent lands simultaneously as he slips inside the jab.
I keep my shoulder up and chin down but still feel very exposed when jabbing, and since my arm is often already extended its a bit hard for me to get my left arm back to block.
Any suggestions or techniques you can offer on countering the right cross/overhand off of the jabbing position would be immensely appreciated ! Thanks UG Guys/Girls
All suggestions are appreciated, but boxing centric counters and defensive measures are especially appreciated
It's tough to say without seeing you, but it sounds like you may be leaving your jab out and not returning to a proper guard. This usually happens when you try getting too much power out of the jab and instead of snapping it, you end up pushing it. What also happens when you do this is instead of getting thrown straight, sometimes you will almost cock it back(even if just a hair) and make it easy to counter. If this is the case(which like I said, it is difficult to tell without seeing you), try to concentrate on snapping your jab and bringing your fist back, all in a strait "jabbing" motion(opposed to trying to get a little more on it and lowering your fist right before you throw it).
Hope this helps.
thank you kindly, I think you have hit on a large factor of my issue, namely perhaps not fully returning the jab to gaurd, as this happens often when I attempt to double up on jabs
VU pugilist
Thanks pugilist 
Pugilist82 - It's tough to say without seeing you, but it sounds like you may be leaving your jab out and not returning to a proper guard. This usually happens when you try getting too much power out of the jab and instead of snapping it, you end up pushing it. What also happens when you do this is instead of getting thrown straight, sometimes you will almost cock it back(even if just a hair) and make it easy to counter. If this is the case(which like I said, it is difficult to tell without seeing you), try to concentrate on snapping your jab and bringing your fist back, all in a strait "jabbing" motion(opposed to trying to get a little more on it and lowering your fist right before you throw it).
Hope this helps.
Boom good shit.
Are you engaging on angles ? Or coming straight in ?
try moving after throwing thw strike rather than waiting for.them to answer back.
Engage on favourable angles where they have to adjust in order to catch you out.
Also i agree with the above comment it sounds like your leaving your jabbing arm out.
Pugilist82 is a boss.
TTT
FormrChamp - Are you engaging on angles ? Or coming straight in ?
This. Are you using footwork ? Also, do you telegraph that you're gonna throw the jab ? Even slight unnecessary movements can telegraph the jab.
Here is stellar video on body positioning and working angles. I recommend everyone interested in proper boxing fundamentals watch this.
http://www.youtube.com/watch?v=81non05aKX4
You said when you double up on jabs you get countered. Is your rear foot coming with you when you throw your double? Sometimes you see people throw their first jab, they step forward with their lead foot but don't slide their rear foot up so when you go to jab again there's not much on it and your feet are too spread out. I was taught (because I used to get crushed doubling up on my jab!) that my second jab has to be harder than my first. My coach made a rope that I still have and use, I loop it around each ankle and when I practice my movement it reminds me to move bot feet. If I take a step with my left, I have to then step with my right.
Pugilist82 - It's tough to say without seeing you, but it sounds like you may be leaving your jab out and not returning to a proper guard. This usually happens when you try getting too much power out of the jab and instead of snapping it, you end up pushing it. What also happens when you do this is instead of getting thrown straight, sometimes you will almost cock it back(even if just a hair) and make it easy to counter. If this is the case(which like I said, it is difficult to tell without seeing you), try to concentrate on snapping your jab and bringing your fist back, all in a strait "jabbing" motion(opposed to trying to get a little more on it and lowering your fist right before you throw it).
Hope this helps.
This + use some fakes/fients. If a guy keeps countering you. Especially if its off of your 1st movement fake then go
awesome from all of yall, in response Formrchamp, Devlin, and pheonix, recalling from sparring I often attempt to split the opponents gaurd and do in fact advance straight forward as yall alluded to, thanks very insightful, so many little things that seem to make or break a move. In regards to jabbing at angle, if im understanding correctly, I should be
stepping off to my opponents left (my right as an orthodox when I jab?
AJM1218, wow another nuance that I think was missing from my jab technique. I've seen the rope before but have never acually thought about employing it in training , but its application here is very apparent . Badass, since I think may certainly be stepping forward without back leg recovery
Good point on the feints as well Bloodstorm.
Good point on the feints as well Bloodstorm.
Raise the punching shoulder while jabbing to tuck the chin behind it.
Good info here.
Could you be admiring your work on eve you get your jab off? I see a lot if guys doing that, and that's the time they're vulnerable to a counter. Snap it out and then right back to your cheek 
video yourself and study it for improvements