I was looking up a LAS-EWR to check the flight status but didn't know the flight number, when I looked at the timetable to find the flight number I noticed this connection

CO1582 LAS 1255a CLE 753a 738
CO2542 CLE 900a BWI 1018a E145
CO2796 BWI 1025A EWR 1128a E145

Is this a legal connection? Don't you have to be at the gate 10 minutes before departure?