Are we underrating Cowboys Micah Parsons, a warning for Mavs fans from Dirk Nowitzki, third-place Rangers reach for positivity and hype over phones and grocery stores, all in this week’s DFW sports notebook. WHITT’S END 9.23.22: Whether you’re at the end of your coffee, your day, your week or even your rope, welcome to Whitt’s End … *Monday night madness … With 83 starring roles, the Dallas Cowboys have the second-most appearances on Monday Night Football behind only the Miami Dolphins. With that quantity has come some unforgettable quality. The Cowboys are 49-34 all-time on Monday nights entering next week’s…