Fred Johnson is the oldest rookie in a game. He was 44 years and 201 days old against the Tigers on September 27, 1938.

Interpreted as:

oldest player MLB rookie by age in a regular-season game

	NAME	AGE	DATE	TM		OPP	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP
1	Fred Johnson F. Johnson	44-201	9/27/1938	SLA	@	DET	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
2	Fred Johnson F. Johnson	44-198	9/24/1938	SLA	vs	CWS	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
3	Fred Johnson F. Johnson	44-194	9/20/1938	SLA	vs	BSA	2	0	1	0	0	0	0	0	0	0	0	0	2	1	0	0
4	Fred Johnson F. Johnson	44-191	9/17/1938	SLA	vs	WSH	1	0	1	0	0	0	0	0	0	0	0	0	1	1	0	0
5	Fred Johnson F. Johnson	44-173	8/30/1938	SLA	@	BSA	1	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0
6	Fred Johnson F. Johnson	44-170	8/27/1938	SLA	@	PHA	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
7	Fred Johnson F. Johnson	44-169	8/26/1938	SLA	@	PHA	2	0	0	0	0	0	0	0	0	0	0	0	3	0	0	1
8	Fred Johnson F. Johnson	44-167	8/24/1938	SLA	@	WSH	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
9	Fred Johnson F. Johnson	44-166	8/23/1938	SLA	@	WSH	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
10	Fred Johnson F. Johnson	44-162	8/19/1938	SLA	@	DET	2	0	0	0	0	0	0	0	0	0	0	0	2	0	0	0
11	Fred Johnson F. Johnson	44-160	8/17/1938	SLA	@	CLE	2	1	1	0	0	0	0	0	0	0	0	0	2	1	0	0
12	Fred Johnson F. Johnson	44-153	8/10/1938	SLA	vs	CLE	4	0	0	0	0	0	0	0	0	2	0	0	4	0	0	0
13	Fred Johnson F. Johnson	44-149	8/6/1938	SLA	vs	PHA	1	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0
14	Fred Johnson F. Johnson	44-148	8/5/1938	SLA	vs	PHA	4	0	1	0	0	0	2	0	0	0	0	0	4	1	0	0
15	Fred Johnson F. Johnson	44-142	7/30/1938	SLA	vs	BSA	1	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0
16	Fred Johnson F. Johnson	44-139	7/27/1938	SLA	vs	NYY	4	1	2	0	0	0	1	0	0	0	0	0	4	2	0	0
17	Fred Johnson F. Johnson	44-134	7/22/1938	SLA	@	WSH	1	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0
18	Diomedes Olivo D. Olivo	43-251	9/30/1962	PIT	@	MIL	1	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0	0	0	0
19	Diomedes Olivo D. Olivo	43-239	9/18/1962	PIT	vs	CIN	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
20	Diomedes Olivo D. Olivo	43-237	9/16/1962	PIT	vs	SFG	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
21	Diomedes Olivo D. Olivo	43-229	9/8/1962	PIT	@	LAD	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
22	Diomedes Olivo D. Olivo	43-226	9/5/1962	PIT	@	HOU	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
23	Diomedes Olivo D. Olivo	43-220	8/30/1962	PIT	vs	CHC	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
24	Diomedes Olivo D. Olivo	43-218	8/28/1962	PIT	vs	CHC	1	0	0	0	0	0	0	0	0	1	0	0	1	0	0	0	0	0	0
25	Diomedes Olivo D. Olivo	43-216	8/26/1962	PIT	@	STL	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0