Prep Baseball Report

Top-10 Profiles of 2024: No. 4 Montgomery O'Brien


Wisconsin Staff

At the end of each calendar year, the Prep Baseball Wisconsin Staff highlights the 10 most viewed profiles of 2024 in the state of Wisconsin. Today, we’ll be continuing our way up to the top spot with No. 4 and unveiling the No. 1 most viewed profile Dec. 30.

Our profiles serve as an all-in-one platform for players, hosting vendors such as verified stats, event video, contact information, and more. To create a free Prep Baseball profile, click HERE.

Ranking at No. 4 in the most-viewed profiles of 2024 is LHP Montgomery O'Brien (Wauwatosa East, 2026; Notre Dame commit).

O'Brien was another breakout in the 2026 class, starting back at the Milwaukee Preseason ID where O'Brien showed improvements in every part of the game, especially the mound. O'Brien ran his fastball up to 87 mph back in March with a pair of secondaries that he threw for strikes. The left-hander would continue to toss quality innings on the mound in front of our staff throughout the spring and summer.

O'Brien was a member of Team Wisconsin, where he elevated his prospect status once again, reaching 90 mph with his fastball while filling the zone with his entire arsenal. The athletic left-hander announced his commitment to Notre Dame in late October and will look to build off his 2024 this spring leading Wauwatosa East.


Scouting Report

11/13/24

7/30/24

Positional Profile: LHP/OF
Body: 6-2, 178.8-pounds.
Delivery: High 3/4 slot, quick, loose, aggressive, repeats, on-line arm action.
Arm Action: LH. Medium leg lift, lands cross body to create deception, dynamic, well-sequenced.
FB: T85, 82-85 mph. Backspin, good carry through the zone. T2303, 2211 average rpm.
CB: 74-74 mph. Tight break, 11/5 shape, out pitch weapon. T2247, 2247 average rpm.
SL: 74-76 mph. Mostly lateral break, can land. T2237, 2187 average rpm.
CH: 76-77 mph. Sink and fade with good sell of the pitch. T1562, 1522 average rpm.

7/30/24

Montgomery O'Brien, Wauwatosa East (WI), 2026
Positional Profile: LHP/OF
Body: 6-2, 178.8-pounds.
Hit: LHH. Narrow and slightly open setup, rhythmic trigger on time. Short path to the baseball, feel for the barrel, easy, simple, line drives. 68.7 mph bat speed with 12 G's of rotational acceleration.
Power: 93 max exit velocity, averaged 85.1 mph. 354' max distance.
Arm: LH. OF-83 mph. Longer over the top action, carry and accuracy, repeats it.
Defense: Attacks the baseball with intent, steady hands, active footwork.
ATH: 7.40 runner in the 60.

7/17/24

Possessing an athletic and lengthy 6-foot-1, 185-pound frame, Montgomery O’Brien was shoving on the mound for Prospect Training Academy. The lefty threw for 4.1 innings only giving up two hits and striking out six. Mechanically, he is tall on the mound and fully extends stepping toward the left-handed batter’s box with a high 3/4 arm slot. O’Brien’s fastball topped 86 and was sitting 80-84 mph most of the game. His 12-6 curveball is thrown a lot slower at 67-71 mph which keeps the hitters off balance.

3/16/24

Positional Profile: LHP/OF
Body: 6-1, 178-pounds. Long frame, athletic, will fill.
Delivery: Athletic arm action, loose with whip, 3/4 slot.
Arm Action: LH. Stretch only, high leg kick works in-line to home.
FB: T87, 84-86 mph. Life out of the hand, occasional cut. T2240, 2145 average rpm.
CB: 71-72 mph. Sharp downer movement, 1/7 shape. T2117, 2049 average rpm.
SL: 74-75 mph. Sharp tight sweeping action. T2235, 2153 average rpm.
ATH: 7.22 runner in the 60. 26.90 max vertical.

3/16/24

Positional Profile: LHP/OF
Body: 6-1, 178-pounds. Long frame, athletic, will fill.
Hit: LHH. Stock set up, slightly open, easy toe tap back, on time to hitting position, smooth. Downhill, loose hands through the ball, ball jumps to all fields. 72.7 mph bat speed with 16 G's of rotational acceleration.
Power: 96 max exit velocity, averaged 86.4 mph. 359' max distance.
Arm: LH. OF-91 mph. Full arm action, 3/4 slot, quick and whippy out front.
Defense: Moves well with size, clean transfer.
ATH: 7.22 runner in the 60. 26.90 max vertical.

3/16/24

LHP/OF Montgomery O’Brien (Wauwatosa East, 2026) came away as one of the day’s biggest winners, catapulting himself into a name to closely monitor heading into the spring. Listed at a lean 6-foot-1, 177 pounds, O’Brien took one of the more consistent rounds of BP, averaging an exit speed of 86.4 mph while reaching a max of 95.9 mph, and his furthest batted ball traveled over 350 feet. O’Brien teased his arm strength during his round of outfield defense when he reached a 91 mph high on his hardest throw. His arm strength carried over to the mound exceptionally well. From a loose and clean delivery, O’Brien’s fastball sat in the mid-80s and topped at 86.7 mph with over 16 inches of induced vertical break through the zone. He also spun in a pair of deadly breaking balls; a low-70s curveball with sharp 1/7 break paired with late downer action and a tight sweeping slider in the mid-70s. Overall it was a standout showing from O’Brien and he is now firmly one of the most intriguing southpaws in the state.


RELATED CONTENT