Baller, I am still not sure why you want to spend 30 minutes on Monday running, especially since Monday is a lift day. Further, why workout 6 days per week when you can get the same strength and conditioning benefits in 3? It is all about working smarter, not harder or more often.
1) follow the lifting protocol your coach gave you: Whatever exercises, 3x/week, just don't take excessive rest between sets/exercises, not more than 30 seconds, preferrably less;
2) on those days, and ONLY those days, follow the lifting with High Intensity Interval Training (HIIT). You only need to complete ONE workout of HIIT per day to get maximum benefit. Here is all I would do if I were you: get 2-10lbs dumbells. Take one in each hand. Take a step for a deep lunge, keeping the dumbells at your side. As you stand, perform a front shoulder raise with both dumbells. Lower the dumbells as you take your next step and repeat. Do this as many times, in control and with good form, as you can for 20 seconds. Rest for precisely 10 seconds. This constitutes one set. Repeat for a total of 8 sets. You will be amazed at your heart rate and the amount of sweat.
Your anaerobic capacity will improve far better than running for 15 minutes x2.
Further, your body will get to recover on the off days and taking the weekend off will get you ready for another intense week of exercise. You will come back from the summer in far better shape than anyone else.
I have several other HIIT routines, with rsistance or not, that you can perform if you wish. I am currently developing an incredible vertical jump program for b'ballers and v'ballers. Should be published by Sept/Oct.
All the best this summer. Any questions, don't hesitate to ask.