Teams

Team Sullivan

2025 Adult 18 & Over-Knoxville · 4.5 Men

12 players · average NTRP 4.38 / TENNESSEE

View scouting list →
Schedule6 played
2025-04-27vs Jumper/KnoxvilleLost 02
L#1 DoublesJerry Witherspoon / Greg Kirby vs Alexandr Rudenco / John Foust4-6, 6-7
L#2 DoublesCharles Jansing / Blake Trusty vs Douglas Corbett / Raphael Barata3-6, 1-6
2025-04-13vs Jumper/KnoxvilleLost 04
L#1 DoublesAndy Gerdt / Blake Trusty vs Thomas Locke / Joel-Ross Richmond2-6, 3-6
L#1 SinglesJerry Witherspoon vs John Foust4-6, 4-6
L#2 DoublesPeter Brewer / Grant Parker vs Scott Gallimore / Eli MacOn3-6, 2-6
L#3 DoublesJeff Sullivan / Greg Kirby vs Theo Liakonis / John MacOn2-6, 2-6
2025-04-06vs Jumper/KnoxvilleWon 21
W#1 DoublesHayden Oakley / Greg Kirby vs Zachary Jumper / Haddy Salem3-6, 6-3, 1-0
L#1 SinglesJerry Witherspoon vs Eli MacOn4-6, 6-7
W#2 DoublesGrant Parker / Blake Trusty vs Douglas Corbett / John Foust6-3, 5-7, 1-0
2025-03-30vs Jumper/KnoxvilleLost 03
L#1 DoublesGrant Parker / Brent Markowitz vs Lanny Martin / Eli MacOn4-6, 2-6
L#1 SinglesJerry Witherspoon vs Marco Kraus0-6, 1-6
L#2 DoublesBlake Trusty / Charles Jansing vs Douglas Corbett / Lance Saunders4-6, 1-6
2025-03-23vs Jumper/KnoxvilleLost 13
L#1 DoublesBlake Trusty / Brent Markowitz vs Raphael Barata / Lanny Martin3-6, 1-6
L#1 SinglesJerry Witherspoon vs Douglas Corbett3-6, 1-6
L#2 DoublesCharles Jansing / Peter Brewer vs Scott Gallimore / Joel-Ross Richmond1-6, 2-6
W#3 DoublesHayden Oakley / Greg Kirby vs Zachary Jumper / Alexandr Rudenco6-3, 3-6, 1-0
2025-03-09vs Jumper/KnoxvilleLost 05
L#1 DoublesHayden Oakley / Greg Kirby vs Lanny Martin / Raphael Barata4-6, 6-1, 0-1
L#1 SinglesJacob Kellner vs Gonzalo de Villa6-7, 2-6
L#2 DoublesGrant Parker / Peter Brewer vs Eli MacOn / Joel-Ross Richmond3-6, 4-6
L#2 SinglesJerry Witherspoon vs Lance Saunders2-6, 2-6
L#3 DoublesShingo Sugawara / Brent Markowitz vs Zachary Jumper / Thomas Locke6-3, 2-6, 1-0
A tie can be incomplete. Tell us if someone is missing.
i
Grouped by tie — one fixture, several lines. A line shows only when a player on it is someone we have indexed, so an early-season tie for a newly-added team can look short. This also means the line count here will not match the header, which counts individual player appearances.

Flight standings for 4.5 Men have not been collected yet. Where we have them we show every team in the flight ranked, with this team highlighted. The crawler is still filling in older seasons and flights.

ScoutingWhere each opponent usually plays

Signed-in extra: whether this captain plays strict strength order or mixes it up, from every doubles line they have put out. Create a free account to see it.

Roster averages 3.99 estimated across 6 rated players. No lineup is published in advance, so the column below is where each player has actually been used — a captain's habits are the best available forecast. Sign in and claim your record to see who you have played.

Brent Markowitz
usually #1 Doubles 67%, also #3 Doubles 33% · published 4.5
Charles Jansing
usually #2 Doubles 100% · published 4.5
Grant Parker
usually #2 Doubles 75%, also #1 Doubles 25% · published 4.5
4.17
Greg Kirby
usually #1 Doubles 60%, also #3 Doubles 40% · published 4.5
4.02
Hayden Oakley
usually #1 Doubles 67%, also #3 Doubles 33% · published 4.5
3.99
Blake Trusty
usually #2 Doubles 60%, also #1 Doubles 40% · published 4.5
3.96
Jerry Witherspoon
usually #1 Singles 67%, also #1 Doubles 17% · published
3.90
Jacob Kellner
usually #1 Singles 100% · published 4
3.88
Andy Gerdt
usually #1 Doubles 100% · published 4
Noah Griffin
published
Peter Brewer
usually #2 Doubles 100% · published
Shingo Sugawara
usually #3 Doubles 100% · published
Established pairs

Doubles pairs from this roster with three or more matches together anywhere — ordered by performance against what the rating gap predicted, not by record.

Greg Kirby + Hayden Oakley3347% games−6.8% vs expected
Roster

Ordered by our estimated dynamic rating, which is why two players at the same published level are not tied — a published 4.0 says nothing about where inside the band someone sits. Lines played in this team’s season are shown beside each name.

4.5
Brent Markowitz
7W–6L career · 3 lines in 2025
not enough data
4.5
Charles Jansing
3W–7L career · 3 lines in 2025
not enough data
4.5
Grant Parker
1W–3L career · 4 lines in 2025
not enough data
4.5
Greg Kirby
18W–8L career · 5 lines in 2025
9%90%1%
4.17
4.5
Hayden Oakley
13W–13L career · 3 lines in 2025
44%56%<1%
4.02
4.5
Blake Trusty
3W–9L career · 5 lines in 2025
52%48%<1%
3.99
Jerry Witherspoon
12W–12L career · 6 lines in 2025
<1%63%37%
3.96
4
Jacob Kellner
4W–11L career · type A · 2 lines in 2025
<1%78%22%
3.90
4
Andy Gerdt
56W–78L career · 1 line in 2025
<1%81%19%
3.88
Noah Griffin
1W–3L career · no lines in 2025
not enough data
Peter Brewer
9W–13L career · 3 lines in 2025
not enough data
Shingo Sugawara
6W–10L career · 1 line in 2025
not enough data

Three percentages are where each player stands right now: the chance they are below their band, inside it, or above it, on the way they are playing this season. The number on the right is our estimated dynamic rating, which USTA never publishes. This is today rather than a forecast of December, because a forecast has to assume future matches and cannot know whether someone will even be offered them. Percentages are blank where a player has too few matches this season, or at a level where the model does not yet beat a base-rate guess; the estimate is a weaker claim than a probability and survives where those do not.

Not affiliated with or endorsed by the USTA. Ratings labelled as published are USTA year-end figures; anything we describe as an estimate is ours, not USTA’s. Match data is from USTA TennisLink.