The 2019-20 roster for the Blues included Ryan O'Reilly at center, David Perron at left wing, Vladimir Tarasenko at right wing, Alex Pietrangelo at defenseman and Jordan Binnington at goalie.

	NO.	NAME	POS	HEIGHT	WEIGHT	DOB	AGE	BIRTHPLACE
1	34	Jake Allen J. Allen	G	6'2"	203	8/7/1990	29	Fredericton, Canada
2	49	Ivan Barbashev I. Barbashev	C	6'0"	187	12/14/1995	24	Moscow, Russia
3	50	Jordan Binnington J. Binnington	G	6'1"	174	7/11/1993	26	Richmond Hill, Canada
4	9	Sammy Blais S. Blais	LW	6'2"	205	6/17/1996	23	Montmagny, Canada
5	41	Robert Bortuzzo R. Bortuzzo	D	6'4"	216	3/18/1989	30	Thunder Bay, Canada
6	19	Jay Bouwmeester J. Bouwmeester	D	6'4"	206	9/27/1983	36	Edmonton, Canada
7	21	Tyler Bozak T. Bozak	C	6'1"	199	3/19/1986	33	Regina, Canada
8	36	Troy Brouwer T. Brouwer	RW	6'3"	213	8/17/1985	34	Vancouver, Canada
9	29	Vince Dunn V. Dunn	D	6'0"	203	10/29/1996	23	Mississauga, Canada
10	15	Robby Fabbri R. Fabbri	LW	5'10"	190	1/22/1996	24	Mississauga, Canada
11	72	Justin Faulk J. Faulk	D	6'0"	217	3/20/1992	27	South St. Paul, MN
12	4	Carl Gunnarsson C. Gunnarsson	D	6'2"	198	11/9/1986	33	Orebro, Sweden
13	37	Klim Kostin K. Kostin	C	6'3"	212	5/5/1999	20	Penza, Russia
14	33	Jordan Kyrou J. Kyrou	C	6'0"	175	5/5/1998	21	Toronto, Canada
15	28	Mackenzie MacEachern M. MacEachern	LW	6'2"	190	3/9/1994	25	Bloomfield Hills, MI
16	77	Niko Mikkola N. Mikkola	D	6'4"	185	4/27/1996	23	Kiiminki, Finland
17	90	Ryan O'Reilly R. O'Reilly	C	6'1"	216	2/7/1991	28	Clinton, Canada
18	55	Colton Parayko C. Parayko	D	6'6"	230	5/12/1993	26	St. Albert, Canada
19	57	David Perron D. Perron	LW	6'0"	200	5/28/1988	31	Sherbrooke, Canada
20	27	Alex Pietrangelo A. Pietrangelo	D	6'3"	210	1/18/1990	30	King City, Canada
21	53	Austin Poganski A. Poganski	LW	6'1"	198	2/16/1996	23	St. Cloud, MN
22	51	Derrick Pouliot D. Pouliot	D	6'0"	196	1/16/1994	26	Estevan, Canada
23	12	Zach Sanford Z. Sanford	LW	6'4"	207	11/9/1994	25	Salem, MA
24	6	Marco Scandella M. Scandella	D	6'3"	212	2/23/1990	29	Montreal, Canada
25	10	Brayden Schenn B. Schenn	C	6'1"	200	8/22/1991	28	Saskatoon, Canada