Here is scenario in which Doosan wins 62 additional games (89 total) but does not reach the postseason.

Here are the final standings in the scenario:
            Team	W	L	D	PCT	GB
          Hanwha	91	50	3	0.6454	0.0
             KIA	89	51	4	0.6357	1.5
           Lotte	89	51	4	0.6357	1.5
              KT	89	52	3	0.6312	2.0	See explanation of tie-breakers below.
         Samsung	89	52	3	0.6312	2.0	See explanation of tie-breakers below.
          Doosan	89	52	3	0.6312	2.0	See explanation of tie-breakers below.
              LG	47	93	4	0.3357	43.5
              NC	45	93	6	0.3261	44.5
             SSG	40	100	4	0.2857	50.5
          Kiwoom	33	107	4	0.2357	57.5

Explanation of Tie-breakers:
The following table shows how many games each of the teams tied for fifth place in the scenario have already won against each other:
Team	Doosan	KT	Samsung	Total
Doosan	-	2	3	5
KT	6	-	5	11
Samsung	4	2	-	6

The following table shows how many additional games each of the teams tied for fifth place win against each other in the scenario:
Team	Doosan	KT	Samsung	Total
Doosan	-	4	4	8
KT	3	-	1	4
Samsung	5	8	-	13

The following table shows how many games total each of the teams tied for fifth place win against each other in the scenario:
Team	Doosan	KT	Samsung	Total
Doosan	-	6	7	13
KT	9	-	6	15
Samsung	9	10	-	19


To construct the scenario, we start with the current standings:
            Team	W	L	D	GL	PCT	GB
          Hanwha	42	27	1	74	0.609	0.0
              LG	40	28	2	74	0.588	1.5
           Lotte	37	31	3	73	0.544	4.5
         Samsung	37	32	1	74	0.536	5.0
              KT	36	32	3	73	0.529	5.5
             SSG	35	32	2	75	0.522	6.0
             KIA	35	33	1	75	0.515	6.5
              NC	30	33	4	77	0.476	9.0
          Doosan	27	40	3	74	0.403	14.0
          Kiwoom	20	51	2	71	0.282	23.0

The next two tables show, respectively, how many of their remaining games each team wins and ties against each of the other teams in the scenario:

					Scenario Additional Wins Against
Team	Doosan	Hanwha	KIA	Kiwoom	KT	LG	Lotte	NC	Samsung	SSG	Wins
Doosan	-	4	7	6	4	10	6	10	4	11	62
Hanwha	3	-	3	10	0	6	3	7	7	10	49
KIA	0	4	-	7	5	11	5	9	2	11	54
Kiwoom	0	0	0	-	0	7	0	0	0	6	13
KT	3	8	1	7	-	11	4	10	1	8	53
LG	0	0	0	0	0	-	0	7	0	0	7
Lotte	1	5	4	7	3	11	-	10	6	5	52
NC	0	0	0	5	0	0	0	-	0	10	15
Samsung	5	2	3	11	8	7	2	7	-	7	52
SSG	0	0	0	3	0	2	0	0	0	-	5
-----------------------------------------------------------------------------------
Losses	12	23	18	56	20	65	20	60	20	68

					Scenario Additional Draws (Ties) With
Team	Doosan	Hanwha	KIA	Kiwoom	KT	LG	Lotte	NC	Samsung	SSG	Total
Doosan	-	0	0	0	1	0	0	2	0	0	0
Hanwha	0	-	1	0	0	1	0	0	1	0	2
KIA	0	1	-	1	0	0	1	0	1	0	3
Kiwoom	0	0	0	-	0	0	0	3	0	0	2
KT	0	0	0	0	-	0	2	0	0	0	0
LG	0	0	0	0	0	-	1	0	0	2	2
Lotte	0	0	1	0	0	0	-	0	0	0	1
NC	0	0	0	2	0	0	0	-	0	1	2
Samsung	0	1	1	0	0	0	0	0	-	1	2
SSG	0	0	0	0	0	2	0	0	0	-	2
-----------------------------------------------------------------------------------
Total	0	2	3	2	0	2	1	2	2	2

The next two tables show, respectively, how many total games each team wins and ties against each of the other teams in the scenario:

					Scenario Total Wins Against
Team	Doosan	Hanwha	KIA	Kiwoom	KT	LG	Lotte	NC	Samsung	SSG	Wins
Doosan	-	8	9	13	6	13	10	11	7	12	89
Hanwha	8	-	8	15	5	10	7	13	11	14	91
KIA	7	7	-	12	10	13	9	13	5	13	89
Kiwoom	3	1	3	-	2	10	2	2	0	10	33
KT	9	11	6	14	-	14	6	12	6	11	89
LG	3	5	3	6	2	-	3	12	5	8	47
Lotte	6	9	6	14	8	12	-	13	11	10	89
NC	3	3	3	11	4	4	3	-	3	11	45
Samsung	9	4	10	16	10	11	5	13	-	11	89
SSG	4	2	3	6	5	6	6	4	4	-	40
-----------------------------------------------------------------------------------
Losses	52	50	51	107	52	93	51	93	52	100

					Scenario Total Draws (Ties) With
Team	Doosan	Hanwha	KIA	Kiwoom	KT	LG	Lotte	NC	Samsung	SSG	Total
Doosan	-	0	0	0	1	0	0	2	0	0	3
Hanwha	0	-	1	0	0	1	0	0	1	0	3
KIA	0	1	-	1	0	0	1	0	1	0	4
Kiwoom	0	0	0	-	0	0	0	3	0	0	4
KT	0	0	0	0	-	0	2	0	0	0	3
LG	0	0	0	0	0	-	1	0	0	2	4
Lotte	0	0	1	0	0	0	-	0	0	0	4
NC	0	0	0	2	0	0	0	-	0	1	6
Samsung	0	1	1	0	0	0	0	0	-	1	3
SSG	0	0	0	0	0	2	0	0	0	-	4
-----------------------------------------------------------------------------------
Total	3	3	4	4	3	4	4	6	3	4