Paul Pierce had a true shooting percentage of 54.0 in his rookie season in 1998-99.

NAME	TS%	SEASON	TM	GP	MPG	PPG	RPG	APG	SPG	BPG	TPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	MIN	PTS	REB	AST	STL	BLK	TOV	PF	+/-
Paul Pierce	54.0	1998-99	BOS	48	34.0	16.5	6.4	2.4	1.7	1.0	2.4	5.9	13.5	43.9	1.8	4.3	41.2	2.9	4.1	71.3	1,632	791	309	115	82	50	113	139	-64
Paul Pierce	55.0	1999-00	BOS	73	35.4	19.5	5.4	3.0	2.1	0.8	2.4	6.7	15.1	44.2	1.3	3.8	34.3	4.9	6.2	79.8	2,583	1,427	396	221	152	62	178	237	+188
Paul Pierce	56.3	2000-01	BOS	82	38.0	25.3	6.4	3.1	1.7	0.8	3.2	8.4	18.5	45.4	1.8	4.7	38.3	6.7	9.0	74.5	3,120	2,071	522	253	138	69	262	251	-77
Paul Pierce	57.0	2001-02	BOS	82	40.3	26.1	6.9	3.2	1.9	1.0	2.9	8.6	19.5	44.2	2.6	6.3	40.4	6.3	7.8	80.9	3,302	2,144	566	261	154	86	241	237	+314
Paul Pierce	53.2	2002-03	BOS	79	39.2	25.9	7.3	4.4	1.8	0.8	3.6	8.4	20.2	41.6	1.5	4.9	30.2	7.6	9.5	80.2	3,096	2,048	578	349	139	62	288	227	+124
Paul Pierce	51.7	2003-04	BOS	80	38.7	23.0	6.5	5.1	1.6	0.7	3.8	7.5	18.7	40.2	1.4	4.8	29.9	6.5	7.9	81.9	3,099	1,836	522	410	131	52	303	234	-67
Paul Pierce	58.3	2004-05	BOS	82	36.1	21.6	6.6	4.2	1.6	0.5	2.8	6.8	14.9	45.5	1.3	3.6	37.0	6.7	8.1	82.2	2,960	1,769	539	348	133	39	230	255	+182
Paul Pierce	58.2	2005-06	BOS	79	39.0	26.8	6.7	4.7	1.4	0.4	3.5	8.7	18.5	47.1	1.4	4.0	35.4	7.9	10.3	77.2	3,084	2,116	530	375	107	34	273	223	-59
Paul Pierce	57.1	2006-07	BOS	47	37.0	25.0	5.9	4.1	1.0	0.3	3.2	7.9	18.1	43.9	2.3	5.9	38.9	6.8	8.6	79.6	1,740	1,173	277	194	48	13	152	122	+2
Paul Pierce	59.9	2007-08	BOS	80	35.9	19.6	5.1	4.5	1.3	0.5	2.8	6.4	13.7	46.4	1.8	4.6	39.2	5.1	6.1	84.3	2,874	1,570	411	363	101	36	221	200	+785
Paul Pierce	58.2	2008-09	BOS	81	37.5	20.5	5.6	3.6	1.0	0.3	2.8	6.7	14.6	45.7	1.5	3.8	39.1	5.7	6.8	83.0	3,035	1,658	457	294	80	27	228	215	+533
Paul Pierce	61.3	2009-10	BOS	71	34.0	18.3	4.4	3.1	1.2	0.4	2.3	5.8	12.2	47.2	1.5	3.7	41.4	5.2	6.1	85.2	2,411	1,296	310	218	84	31	166	196	+255
Paul Pierce	62.0	2010-11	BOS	80	34.7	18.9	5.4	3.3	1.0	0.6	2.1	6.3	12.8	49.7	1.4	3.7	37.4	4.8	5.6	86.0	2,774	1,511	430	260	80	51	171	231	+594
Paul Pierce	56.7	2011-12	BOS	61	34.0	19.4	5.2	4.5	1.1	0.4	2.8	6.5	14.6	44.3	1.6	4.5	36.6	4.8	5.6	85.2	2,075	1,181	317	274	70	26	173	147	+192
Paul Pierce	55.9	2012-13	BOS	77	33.4	18.6	6.3	4.8	1.1	0.4	2.8	6.2	14.2	43.6	1.9	5.0	38.0	4.3	5.5	78.7	2,575	1,430	487	370	84	30	214	210	+123
Paul Pierce	59.5	2013-14	BKN	75	28.0	13.5	4.6	2.4	1.1	0.4	2.0	4.3	9.5	45.1	1.5	4.0	37.3	3.4	4.1	82.6	2,098	1,010	348	178	86	31	153	190	+74
Paul Pierce	58.0	2014-15	WAS	73	26.2	11.9	4.0	2.0	0.6	0.3	1.3	4.0	9.0	44.7	1.6	4.2	38.9	2.2	2.9	78.1	1,914	868	294	144	46	24	92	160	+162
Paul Pierce	48.9	2015-16	LAC	68	18.1	6.1	2.7	1.0	0.5	0.3	0.9	2.1	5.8	36.3	1.1	3.6	31.0	0.8	1.0	81.8	1,231	417	186	71	33	17	58	129	+56
Paul Pierce	53.5	2016-17	LAC	25	11.1	3.2	1.9	0.4	0.2	0.2	0.6	1.1	2.8	40.0	0.6	1.7	34.9	0.4	0.5	76.9	277	81	48	10	4	5	16	40	+28