Cristiano Ronaldo has made the most career appearances by a player younger than 38 in the Champions League, with 183 appearances.

most games before turning 38 years old by a player

	NAME	M	MIN	START	G	G/M	A	G+A	PK
1	Cristiano Ronaldo C. Ronaldo	183	15,816	178	140	0.77	20	160	19
2	Iker Casillas I. Casillas	177	15,817	176	0	0.00	0	0	0
3	Thomas Müller T. Müller	163	10,551	119	57	0.35	18	75	8
4	Lionel Messi L. Messi	163	13,585	150	129	0.79	23	152	18
5	Karim Benzema K. Benzema	152	11,112	132	90	0.59	8	98	3
6	Toni Kroos T. Kroos	151	11,785	135	11	0.07	15	26	0
7	Xavi	151	11,313	126	11	0.07	0	11	2
8	Robert Lewandowski R. Lewandowski	144	11,808	136	109	0.76	14	123	19
9	Sergio Ramos S. Ramos	142	12,478	142	17	0.12	4	21	3
10	Raúl	142	12,015	135	71	0.50			1
11	Manuel Neuer M. Neuer	136	12,300	136	0	0.00	1	1	0
12	Ryan Giggs R. Giggs	132	9,668	112	28	0.21			0
13	Andrés Iniesta A. Iniesta	130	9,239	106	11	0.08	9	20	0
14	Sergio Busquets S. Busquets	129	10,410	121	4	0.03	0	4	0
15	Gerard Piqué G. Piqué	128	10,631	123	16	0.13	0	16	0
16	David Alaba D. Alaba	125	10,091	113	6	0.05	12	18	0
17	Clarence Seedorf C. Seedorf	125	9,545	111	11	0.09			0
18	Paul Scholes P. Scholes	123	9,258	107	24	0.20			2
19	Marquinhos	122	10,619	120	11	0.09	4	15	0
20	Paolo Maldini P. Maldini	122	10,421	119	3	0.02			0
21	Antoine Griezmann A. Griezmann	120	8,890	102	44	0.37	18	62	4
22	Zlatan Ibrahimovic Z. Ibrahimovic	120	9,767	114	48	0.40	4	52	5
23	Roberto Carlos R. Carlos	120	10,487	120	16	0.13			0
24	Xabi Alonso X. Alonso	119	9,740	114	6	0.05	2	8	1
25	Koke	118	9,359	107	5	0.04	10	15	0