Denny Mack

Born: 3/14/1850 in Mauch Chunk, PA, USA

Died: 4/10/1888 in Wilkes-Barre, PA, USA

MLB Debut: 1871-05-06 | Final Game: 1883-09-27

Bats: R | Throws: R | Height: 5'7" | Weight: 164 lbs

Full name: Dennis Joseph Mack

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Biography

Denny Mack was a notable position player in the early days of professional baseball, whose career spanned from 1871 to 1883. Born in 1850, Mack played during a transformative period in the sport, characterized by the shift from the raw, unrefined play of the 1860s to the more structured game that developed in the 1880s. Over the course of his career, he appeared in 373 games, compiling a total of 343 hits, which contributed to a batting average of .228. His offensive contributions included 102 RBIs and one home run, marking him as a reliable player within his teams. Mack was also known for his speed on the bases, amassing 31 stolen bases throughout his career, a notable achievement at a time when base-running strategies were becoming increasingly important. Although his statistics may not reflect the dominance seen in later eras, Mack’s ability to contribute defensively and his versatility as a player helped lay the groundwork for future generations. He retired from the game in 1883, leaving behind a legacy that highlighted the evolution of baseball and the burgeoning skills that would define the sport in the decades to follow.

Career Pitching Statistics

W	L	G	GS	CG	SHO	SV	IP	H	ER	HR	BB	SO	ERA	Pitcher PIV
0	1	3	1	1	0	0	13.0	20	5	0	3	1	3.46	0

Career ERA 3.46 vs. league average 4.22 across their career seasons — 18.0% better than league average.

Season-by-Season Pitching

Year	Team	Lg	W	L	G	GS	CG	SHO	SV	IP	H	ER	BB	SO	ERA	Lg ERA	Pitcher PIV
1871	RC1		0	1	3	1	1	0	0	13.0	20	5	3	1	3.46	4.22 (+18%)	33.1

Career Batting Statistics

G	AB	R	H	2B	3B	HR	RBI	SB	BB	SO	AVG	OBP	SLG	OPS	PIV
373	1505	309	343	42	10	1	102	31	93	40	0.228	0.273	0.271	0.544	-2738.0

Career AVG .228 vs. league average .263 across their career seasons — 13.2% below league average.

Career OBP .273 vs. league average .284 across their career seasons — near league average.

Career SLG .271 vs. league average .339 across their career seasons — 20.0% below league average.

Career OPS 0.544 vs. league average 0.623 across their career seasons — 12.7% below league average.

Season-by-Season Batting

Year	Team	Lg	G	AB	R	H	2B	3B	HR	RBI	SB	BB	SO	AVG	Lg AVG	Lg OBP	Lg SLG	Lg OPS	PIV
1871	RC1		25	122	34	30	7	1	0	17	12	8	7	0.246	.286 (-14%)	.311 (-6%)	.383 (-17%)	.695 (-12%)	-210.9
1872	PH1		47	205	68	59	9	1	0	34	9	23	9	0.288	.285 (+1%)	.296 (+21%)	.347 (-2%)	.644 (+9%)	429.4
1873	PH2		48	205	55	60	5	0	0	19	6	15	9	0.293	.290 (+1%)	.304 (+12%)	.357 (-11%)	.661 (-1%)	94.4
1874	PH2		56	246	48	51	8	4	0	22	4	2	3	0.207	.273 (-24%)	.282 (-24%)	.333 (-18%)	.615 (-21%)	-807.7
1876	SL3	NL	48	180	32	39	5	0	1	7	0	11	5	0.217	.265 (-18%)	.277 (-6%)	.320 (-19%)	.598 (-13%)	-266.8
1880	BFN	NL	17	59	5	12	0	0	0	3	0	5	7	0.203	.244 (-17%)	.267 (-1%)	.319 (-36%)	.586 (-20%)	-120.8
1882	LS2	AA	72	264	41	48	3	1	0	0	0	16	0	0.182	.248 (-27%)	.275 (-17%)	.329 (-39%)	.605 (-29%)	-1090.4
1883	PT1	AA	60	224	26	44	5	3	0	0	0	13	0	0.196	.257 (-24%)	.285 (-16%)	.345 (-29%)	.631 (-23%)	-765.3

Fielding Statistics

Career Fielding Totals by Position

Position	G	GS	PO	A	E	DP
1B	173	105	1694	43	128	81
2B	32	0	77	79	29	13
OF	13	0	9	1	3	0
P	3	1	1	2	0	0
SS	169	22	165	496	101	25

Season-by-Season Fielding

Year	Team	Pos	G	GS	PO	A	E	DP
1871	RC1	1B	24	23	271	6	19	11
1871	RC1	OF	1	0	1	0	0	0
1871	RC1	P	3	1	1	2	0	0
1871	RC1	SS	1	1	1	2	1	0
1872	PH1	1B	26	26	280	11	16	8
1872	PH1	SS	21	21	22	56	25	0
1873	PH2	1B	42	0	429	8	29	20
1873	PH2	2B	1	0	6	2	0	0
1873	PH2	OF	5	0	3	1	1	0
1873	PH2	SS	3	0	2	12	2	0
1874	PH2	1B	56	56	488	8	55	31
1876	SL3	2B	5	0	14	10	4	2
1876	SL3	OF	2	0	3	0	2	0
1876	SL3	SS	41	0	42	114	20	6
1880	BFN	2B	1	0	1	1	0	0
1880	BFN	SS	16	0	18	45	4	3
1882	LS2	2B	24	0	55	59	25	11
1882	LS2	OF	5	0	2	0	0	0
1882	LS2	SS	49	0	51	161	24	9
1883	PT1	1B	25	0	226	10	9	11
1883	PT1	2B	1	0	1	7	0	0
1883	PT1	SS	38	0	29	106	25	7