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Stephen Kolek or Peter Lambert

Who Should I Start? - Week 12 • Start New
Stephen Kolek

Stephen Kolek

SPKansas City Royals KC
Peter Lambert

Peter Lambert

SPHouston Astros HOU
OR
🔓 EXPERT ANALYSIS

Owners starting Kolek over Lambert

 
 
 
 
START BOTH START BENCH BOTH BN

Includes Detailed Projections

Outlook Stephen Kolek

Stephen Kolek's mixed results make him a solid hold after a strong mid-week showing

Kolek slots in as the number five starter for the fifth-place Royals, with his rotation security insulated by injuries to Cole Ragans and Kris Bubic. Though he surrendered four earned runs on May 29, his recent stretch is highlighted by a brilliant 108-pitch complete-game shutout in late May.

Over his last 30 days, Kolek has maintained a solid 3.38 ERA and an elite 0.99 WHIP, far exceeding our projected 4.28 ERA and 1.36 WHIP. While some regression toward his career 3.64 ERA is expected, his improved control suggests he can remain a highly useful fantasy asset.

Kolek already made his lone start of the week on June 3, dominant in a victory against Cincinnati by yielding just two runs over seven frames with eight strikeouts. With no remaining games scheduled for him this week, managers can safely bench him for the weekend. Verdict: Hold.

Updated 1 day ago

Latest News Stephen Kolek
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🔓 EXPERT ANALYSIS

Owners starting Lambert over Kolek

 
 
 
 
START BOTH START BENCH BOTH BN

Includes Detailed Projections

Outlook Peter Lambert

Lambert looks to capitalize on a highly favorable matchup against Oakland amid a thinning Astros rotation

Peter Lambert has cooled off slightly after a stellar start to the year, posting a 4.50 ERA and a bloated 1.70 WHIP over his last 14 days. Despite these recent bumps, the 29-year-old remains firmly in the starting rotation for the fourth-place Astros (28-35). With key starting pitchers like Lance McCullers Jr., Cristian Javier, and Hunter Brown sidelined on the injured list, Lambert’s slot as a back-end starter in the rotation is secure.

While his recent walk rate has ticked up, Lambert's overall 2026 stats (3.79 ERA and 1.22 WHIP) represent a major step forward from his career ratios. Our models project him to settle at a 4.00 ERA and a 1.30 WHIP for the rest of the season. His early-season dominance suggests this breakout is mostly legitimate, though fantasy managers should expect some regression if his control does not stabilize.

Lambert is scheduled for one remaining start this week on June 5 at home against the Athletics. He matches up against Jack Perkins, who has struggled with a 5.96 ERA and 1.32 WHIP. This represents a highly favorable spot for Lambert to bounce back, limit base runners, and secure a win. Given the soft opponent, he is a solid starting option this week. Verdict: Start.

Updated 1 day ago

Latest News Peter Lambert
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Performance Stephen Kolek
Fantasy Chart Loading...

ERA W-L HLD SV SO WLK WHIP GP
4.500-1001331.252
Season stats based on the past 7 days

ERA W-L HLD SV SO WLK WHIP GP
2.571-1001540.953
Season stats based on the past 14 days
Performance Peter Lambert
Fantasy Chart Loading...

ERA W-L HLD SV SO WLK WHIP GP
3.601-000331.601
Season stats based on the past 7 days

ERA W-L HLD SV SO WLK WHIP GP
4.502-000871.702
Season stats based on the past 14 days
Next Up Own/Start Comparison
OWN/START Stephen Kolek
OWN
40%
-7.66 compared to last week
START
25%
-11.64 compared to last week
OWN/START Peter Lambert
OWN
30%
+1.59 compared to last week
START
22%
+7.38 compared to last week
Next Up Consensus Rankings
Expert Consensus Stephen Kolek
115th
Average Ranking of Fantasy Experts
Expert Consensus Peter Lambert
90th
Average Ranking of Fantasy Experts
Next Up Player Breakdowns
Breakdown Stephen Kolek

    Overview

  • Experts rank this player at 115th among SP's. Based on his stats from the past 60 days, he is currently ranked 82nd.
  • The current leader among SP's is Cristopher Sanchez
  • He is doing a lot better than most people thought he would. Can he keep this up or is it a fluke?
  • He hasn't missed that many games lately, but he is listed on the injury report. He's not on the D.L., but may have some nagging injuries with his Personal (Since Jun 4, 2026). Check out his player news.
  • Trending Pitching Stats

  • Top 20 in WHIP and is currently ranked 16th with 0.99
  • Top 75 in ERA and is currently ranked 51st with 3.38
  • Currently ranked 102nd in wins with 3
  • His average points in the past two weeks have remained fairly consistant and rose slightly by 0.5 PPG.
  • At this point in the season his numbers compared to last years: W: EVEN, L: EVEN, WHIP: -0.301, ERA: -0.239, K's: EVEN, Walks: -4
Breakdown Peter Lambert

    Overview

  • Experts rank this player at 91st among SP's. Based on his stats from the past 60 days, he is currently ranked 84th.
  • The current leader among SP's is Cristopher Sanchez
  • He is putting up better numbers than the experts expected him to.
  • Trending Pitching Stats

  • Top 75 in WHIP and is currently ranked 64th with 1.22
  • Top 75 in ERA and is currently ranked 64th with 3.79
  • Top 50 in walks and is currently ranked 40th with 21
  • Top 75 in wins and is currently ranked 51st with 4
  • His average points in the past two weeks have remained fairly consistant and rose slightly by 0.1 PPG.
  • At this point in the season his numbers compared to last years: W: +4, L: +4, WHIP: +1.22, ERA: +3.79, K's: +43, Walks: +21
Next Up Health Check
Injury Stephen Kolek

PERSONAL - Since Jun 4, 2026

Kolek has been placed on the bereavement/family medical emergency leave list and will not take the field for the Royals.
Injury Peter Lambert

No Injury Reported

Next Up Matchup Comparison
Matchups Stephen Kolek
DateOpponentResult
Jun 01@CINLuinder AvilaW 2-9
Jun 02@CINBrock BurkeL 4-3
Jun 03@CINDaniel Lynch IVW 2-5
Jun 04@MINMatt StrahmW 6-8
Jun 05@MINZebby Matthews
Jun 06@MINJoe Ryan
Jun 07@MINConnor Prielipp
ERA W-L HLD SV SO WLK WHIP GP
2.570-000821.141
Season stats based on this weeks opponents
Matchups Peter Lambert
DateOpponentResult
Jun 02VS PITBubba ChandlerL 6-10
Jun 03VS PITAJ BlubaughW 11-9
Jun 04VS PITJared JonesL 1-5
Jun 05VS ATHJack Perkins
Jun 06VS ATHKade Morris
Jun 07VS ATHGage Jump
ERA W-L HLD SV SO WLK WHIP GP
nan-nan0
Season stats based on this weeks opponents
Next Up Ratings Comparison
Rating Stephen Kolek
9.37
FantasySP Player Rating
Rating Peter Lambert
8.89
FantasySP Player Rating
Next Up Career Comparison
Career Stephen Kolek
YEAR TM APP INN PC K WLK SV W-L ERA WHIP K/9 PTS
2024 SD 42 42.0 797 39 12 0 3-0 5.79 1.69 8.4 85
2025 SD 19 110.1 1689 77 31 0 5-7 3.59 1.17 6.3 216
2026 KC 6 38.0 554 27 8 0 3-1 3.32 0.97 6.4 98
ON PACE 15 98 1424 69 20 0 7-2 3.32 0.97 6.4 250
3-YEAR AVG 31 75 1243 58 22 0 4-4 4.32 1.35 7 150
Career 67 188.0 3040 143 51 0 0-0 4.07 1.26 6.9
Career Peter Lambert
YEAR TM APP INN PC K WLK SV W-L ERA WHIP K/9 PTS
2019 COL 19 89.1 1582 57 36 0 3-7 7.25 1.74 5.7 86
2021 COL 2 7.1 123 3 2 0 0-0 8.59 1.91 3.7 0
2023 COL 25 85.0 1450 71 28 0 3-7 5.51 1.42 7.5 122
2024 COL 28 59.0 1039 50 29 0 2-5 5.95 1.73 7.6 68
2026 HOU 8 45.1 763 43 21 0 4-4 3.77 1.21 8.5 96
ON PACE 20 115 1931 108 53 0 10-10 3.77 1.21 8.5 243
3-YEAR AVG 27 71 1245 61 29 0 3-6 5.75 1.56 7.6 95
Career 82 281.1 4957 224 116 0 0-0 6.05 1.59 7.2
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RECENT DECISIONS

Latest from FSP

Player News

Matchups

Week 1
ARI @LAC
ATL @PIT
BAL @IND
BUF @HOU
CAR vs CHI
CIN vs TB
CLE @JAC
DAL @NYG
DEN @KC
DET vs NO
GB @MIN
LAR vs SF
LV vs MIA
NE @SEA
NYJ @TEN
PHI vs WAS
Matchup Time Pitchers
ARI vs WAS 09:40 EDT EST Merrill Kelly
Foster Griffin
ATH @HOU 08:10 EDT EST Jack Perkins
Peter Lambert
ATL vs PIT 07:15 EDT EST Martin Perez
Mitch Keller
BAL @TOR 07:07 EDT EST Brandon Young
Trey Yesavage
BOS @NYY 07:05 EDT EST Sonny Gray
Ryan Weathers
CHC vs SF 02:20 EDT EST Edward Cabrera
Robbie Ray
CHW @PHI 06:40 EDT EST Anthony Kay
Jesus Luzardo
CIN @STL 08:15 EDT EST Brady Singer
Kyle Leahy
CLE @TEX 08:15 EDT EST Parker Messick
Kumar Rocker
COL vs MIL 08:40 EDT EST Ryan Feltner
Brandon Sproat
DET vs SEA 06:40 EDT EST Framber Valdez
Bryan Woo
KC @MIN 08:15 EDT EST Michael Wacha
Zebby Matthews
LAA @LAD 10:10 EDT EST Reid Detmers
Roki Sasaki
MIA vs TB 07:10 EDT EST Ryan Gusto
Drew Rasmussen
NYM @SD 09:40 EDT EST Christian Scott
Michael King
Matchup Time
NY @SA 8:30 PM EST
Matchup Time
No games scheduled