Montgomery
O'Brien

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.

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.

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.

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.

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.

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.

Positional Profile: LHP/OF
Body: 6-0, 160-pounds. High waist. Strength throughout.
Hit: LHH. Open stance, works around the backside, up and down leg lift. Centered load, under control, flat path, sprays line drives to all fields. 64.6 mph bat speed with 15 G’s of rotational acceleration.
Power: 86 max exit velocity, averaged 76.8 mph. 278’ max distance.
Arm: LH. OF - 79 mph. Long draw, into a 3/4 slot, on target to home.
Defense: Aggressive through the baseball, one hand gather into crow hop.
Run: 7.51 runner in the 60.

Positional Profile: LHP/OF 
Body: 6-0, 160-pounds. High waist. Strength throughout. 
Delivery: Medium, inline leg lift. Tall and fall delivery. Slight crossfire action. 
Arm Action: LH. Medium arm loop. 3/4 slot. Some whip. 
FB: T80, 78-80 mph. Some running action.  T2103, 2018 average rpm.
CB: 67-68 mph. 1/7 action with depth.  T2044, 1948 average rpm.
SL: 67-69 mph. Sweeping action.  T2062, 1997 average rpm.

 LHP Monty O’Brien (Wauwatosa East, 2026) is a high upside incoming sophomore to follow after putting together a clean ‘pen on Tuesday. Listed at a projectable 6-foot, 160-pounds with long limbs, O’Brien is a clean mover on the bump and pairs it with a loose arm that projects to add more velocity as he continues to develop. During his ‘pen, O’Brien sat in the 78-80 mph range with a running fastball that featured 15.5’ of horizontal movement at its peak. He also mixed in two breaking balls, the first being a more traditional curveball that played with 1/7 action with depth and the second was a sweeping slider in the high-60s.