Since he entered the league:
ES g/60
1.Matthews 1.56 (15:15toi) ---- 3.08pp
2.Marchand 1.31 (14:17toi) --- 2.50pp
ES p1/60
1.McDavid 2.45 (17:20toi) ------ 4.89pp
2.Matthews 2.34 (15:15toi) ----- 5.03pp
3.Malkin 2.30 (14:42toi) --------- 4.38pp
4.Marchand 2.23 (14:17toi) ---- 4.59pp
5.Stamkos 2.21 (13:53toi) ------- 6.50pp
ES p/60
1.McDavid 3.11 (17:20toi) ------ 6.96pp
2.Marchand 2.92 (14:17toi) ---- 7.41pp
3.Kucherov 2.87 (15:35toi) ----- 8.46pp
4.Stamkos 2.78 (13:53toi) ------- 8.13pp
5.Matthews 2.71 (15:15toi) ----- 6.36pp
Matthews, of course, is the youngest on the list, and the only one whose rookie year is included there.
Oh, and Matthews Under Keefe:
ES 16:53, 3.55g/60, 3.55p1/60, 3.55p/60
PP 1:08, 0.00g/60, 0.00p1/60, 26.87p/60
So he's getting McDavid ice time under keefe now, and his per 60 stats have gotten better, so far.
let's cut off matthews' rookie year, and look at the last 2yrs plus this year:
ES g/60
1.Matthews 1.59 (15:32) ---- 3.29pp
2.Marchand 1.38 (14:18) --- 2.47pp
3.Arvidsson 1.36 (13:42) --- 1.13pp
4.Gallagher 1.33 (13:18) ---- 1.59pp
5.Ovechkin 1.29 (15:34) ---- 3.19pp
ES p1/60
1.McDavid 2.49 (17:36) ----- 5.50pp
1.Matthews 2.49 (15:32) ---- 5.01pp
3.Marchand 2.37 (14:18) ---- 4.94pp
4.Draisaitl 2.34 (16:24) ------ 4.22pp
5.Kucherov 2.27 (15:38) ---- 6.00pp
ES p/60
1.McDavid 3.19 (17:36) ----- 7.21pp
2.Marchand 3.11 (14:18) ---- 7.64pp
3.Kucherov 3.05 (15:38) ---- 8.86pp
4.Matthews 2.94 (15:32) ---- 6.26pp
5.Draisaitl 2.85 (16:24) ------ 5.56pp