Here is scenario in which Lotte wins 88 additional games (100 total) but does not reach the postseason.

Here are the final standings in the scenario:
            Team	W	L	D	PCT	GB
              LG	99	41	4	0.7071	0.0
          Doosan	99	42	3	0.7021	0.5
         Samsung	98	42	4	0.7000	1.0
              KT	100	43	1	0.6993	0.5	See explanation of tie-breakers below.
             SSG	100	43	1	0.6993	0.5	See explanation of tie-breakers below.
           Lotte	100	43	1	0.6993	0.5	See explanation of tie-breakers below.
              NC	38	106	0	0.2639	63.0
          Hanwha	29	115	0	0.2014	72.0
          Kiwoom	26	118	0	0.1806	75.0
             KIA	24	120	0	0.1667	77.0

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	KT	Lotte	SSG	Total
KT	-	1	0	1
Lotte	1	-	1	2
SSG	2	2	-	4

The following table shows how many additional games each of the teams tied for fifth place win against each other in the scenario:
Team	KT	Lotte	SSG	Total
KT	-	4	6	10
Lotte	9	-	0	9
SSG	8	13	-	21

The following table shows how many games total each of the teams tied for fifth place win against each other in the scenario:
Team	KT	Lotte	SSG	Total
KT	-	5	6	11
Lotte	10	-	1	11
SSG	10	15	-	25

The first tiebreaker does not resolve the tie.
The following table shows how many runs each of the teams tied for fifth place as already scored against each other in the scenario:
Team	KT	Lotte	SSG	Total
KT	-	7	2	9
Lotte	7	-	6	13
SSG	4	10	-	14

The following table shows how many additional runs each of the teams tied for fifth place scores against each other in the scenario:
Team	KT	Lotte	SSG	Total
KT	-	4	131	135
Lotte	131	-	0	131
SSG	8	122	-	130

The following table shows how many runs total each of the teams tied for fifth place scores against each other in the scenario:
Team	KT	Lotte	SSG	Total
KT	-	11	133	144
Lotte	138	-	6	144
SSG	12	132	-	144


Lotte finished #7 in the standings last year.
KT finished #5 in the standings last year.

To construct the scenario, we start with the current standings:
            Team	W	L	D	GL	PCT	GB
              LG	17	4	0	123	0.810	0.0
           Lotte	12	10	1	121	0.545	5.5
          Hanwha	12	11	0	121	0.522	6.0
              KT	10	10	1	123	0.500	6.5
         Samsung	11	11	0	122	0.500	6.5
             SSG	9	10	0	125	0.474	7.0
          Doosan	9	11	0	124	0.450	7.5
             KIA	9	12	0	123	0.429	8.0
              NC	7	10	0	127	0.412	8.0
          Kiwoom	8	15	0	121	0.348	10.0

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	-	13	15	14	8	5	5	16	4	10	90
Hanwha	0	-	12	0	0	0	0	5	0	0	17
KIA	0	1	-	13	0	0	0	1	0	0	15
Kiwoom	0	13	0	-	0	0	0	5	0	0	18
KT	5	14	13	15	-	7	4	13	13	6	90
LG	7	13	14	13	7	-	1	14	4	9	82
Lotte	8	14	13	13	9	13	-	13	5	0	88
NC	0	10	13	8	0	0	0	-	0	0	31
Samsung	7	13	14	14	1	7	10	13	-	8	87
SSG	4	13	14	13	8	5	13	16	5	-	91
-----------------------------------------------------------------------------------
Losses	31	104	108	103	33	37	33	96	31	33

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

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	-	14	16	16	9	6	7	16	5	10	99
Hanwha	2	-	14	2	1	0	0	6	1	3	29
KIA	0	2	-	14	2	0	2	2	1	1	24
Kiwoom	0	14	2	-	1	1	0	6	0	2	26
KT	7	15	14	15	-	8	5	15	15	6	100
LG	9	16	16	15	8	-	3	16	6	10	99
Lotte	9	16	14	16	10	13	-	15	6	1	100
NC	0	10	14	10	1	0	1	-	2	0	38
Samsung	9	15	15	16	1	8	10	14	-	10	98
SSG	6	13	15	14	10	5	15	16	6	-	100
-----------------------------------------------------------------------------------
Losses	42	115	120	118	43	41	43	106	42	43

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