The obscurity will decrease during the read, but here goes:
Most points by player who played in a total of X NHL season(s)
One season
Claude St. Sauveur, 1975-76
79 24-24-48 -7
Milan Novy, 1982-83
73 18-30-48 +4
Two seasons
Ivan Hlinka, 1981-83
137 42-81-123 +18
Three seasons
Pekka Rautakallio, 1979-82
235 33-121-154 +13
Four seasons
Blair MacDonald, 1979-1983
219 91-100-191 -8
Five seasons*
Marian Stastny, 1981-86
322 121-173-294 +9
Six seasons
Håkan Loob, 1983-89
450 193-236-429 +103
Seven seasons
Mike Rogers, 1979-86
484 202-317-519 -51
Eight seasons
Pierre Mondou, 1977-85
548 194-262-456 +213
Nine seasons
Kent Nilsson, 1979-87, 1994-95
553 264-422-686 -25
Ten seasons
Mike Bossy, 1977-87
752 573-553-1126 +380
Eleven seasons**
Rick Martin, 1971-82
685 384-317-701 +14
Twelve seasons
Bobby Orr, 1966-77, 1978-79
657 270-645-915 +582
13 seasons
Peter Forsberg, 1994-01, 2002-04, 2005-08, 2010-11
708 249-636-885 +238
14 seasons
Bernie Federko, 1976-90
1000 369-761-1130 -131
15 seasons
Peter Stastny, 1980-95
977 450-789-1239 -15
16 seasons
Dale Hawerchuk, 1981-97
1188 518-891-1409
17 seasons
Mario Lemieux, 1984-94, 1995-97, 2000-04, 2005-06
915 690-1033-1723 +114
18 seasons
Marcel Dionne, 1971-89
1348 731-1040-1771 +27
19 seasons
Adam Oates, 1985-04
1337 341-1079-1420 +33
20 seasons
Wayne Gretzky, 1979-99
1487 894-1963-2857 +520
21 seasons
Teemu Selänne, 1992-04, 2005-14
1451 684-773-1457 +95
22 seasons
Steve Yzerman, 1983-04, 2005-06
1514 692-1063-1755 +184
23 seasons
Ron Francis, 1981-04
1731 549-1249-1798 -18
24 seasons
Jaromir Jagr, 1990-04, 2005-08, 2011-18
1733 766-1155-1921 +322
25 seasons
Mark Messier, 1979-04
1756 694-1193-1887 +211
26 seasons
Gordie Howe, 1946-71, 1979-80
1767 801-1049-1850
Notes:
* Réal Cloutier played only 5 games in his 6th and final season, had a career statline of 146-198-344 in 318 GP
** René Robert played only 5 games in his 1st season out of 12, then had a career statline of 284–418-702 in 744 GP