There are no official rules for throwing other creatures.
However, if homebrew is an option, the PHB has rules regarding grappling and shoving, to begin with.
Grappling means you catch a creature and hold it in place. Shoving means you, well, push a creature far from you, usually 5 feet or 1 square, if you use a card. When you have a creature caught, you can drag it with you at half your movement speed.
Grappling (PHB page 195):
When you want to catch a creature or fight it, you can use the Attack action to launch a special melee attack, a grappling hook.
By using at least one free hand, you try to grab the target
by performing a grapple check, […]
Moving a grappled creature. When you move, you
can drag or carry the creature struggling with you but
your speed is halved unless the creature is two or more
sizes smaller than you.
shove (PHB pp. 195/196):
By using the Attack action, you can create a special scrum
attack to push a creature, either to knock him out, or to
keep him away from you. […]
You are doing a force control (athletics) challenged by the
Target strength (athletics) or dexterity (acrobatics)
check (the target chooses the ability to use). If you win
the contest, you hit the target or push
It's 5 feet from you.
Now, allowing a player to throw a creature instead of shove it certainly would certainly be a homebrew, I am not aware of any official rule for that.
Therefore, let's take a look at the rules for throwing weapons. Most of the time, when you throw a weapon (improvised weapons and most disposable weapons, such as handaxes), you have a range of 20/60, that is, a range of 20 feet for a normal attack and a range of 60 feet with disadvantage. Spears, which are specifically designed to be thrown, have an upper reach (30/120) and the nets have a lower reach (5/15).
thrown (PHB page 148). If a weapon has the property launched, you
can launch the weapon to make a ranged attack.
Improvised weapons (PHB page 147/148)
An object that looks nothing like a weapon
inflicts 1d4 damage (the DM assigns a damage type)
appropriate to the object). If a character uses a row
weapon to make a melee attack, or throw a melee
weapon that does not have the property thrown, he also
Inflicts 1d4 damage. An improvised throwing weapon has a
normal range of 20 feet and a long reach of 60 feet.
Obviously, a creature weighs more than a stick (improvised weapon) or an ax, so you should clearly have a shorter reach. Yet, no official rule about it, then: how could your DM rule?
My ideas come to mind:
Require the player that he take the prowess "grappler", which allows him to pin creatures at stake to further limit their mobility by making them more sober. You could allow lifting as an alternative to pin a creature, and toss them would be a push action.
grappler (PHB page 167):
• You can use your action to try to attach a creature to the
by you. To do this, perform another check of the grapple. Yes
you succeed, you and the creature are both mastered
until the end of the grapple.
If the DM thinks that asking for a feat would be too much, he might also ask you to catch a creature, then perform a contested force test against the creature's power to lift it, then another strength test (that- this). do not challenged) to throw it away.
- The scope could be based on range for throwing weapons (20/60), but reduced because of huge weight differences between a handful and a wolf. I would suggest a range of about 10/30, that is, 10 feet for a normal attack (since you can already push a creature to 5 feet without additional force control or attack roll), and 30 feet with a disadvantage on the attack roll.
- Instead, the maximum launch range could also be based on the player's strength score (5-foot modifier * STR). However, this does not take into account the weight of the creature, although you can obviously throw a rat further than a bear-owl. As a result, you can subtract the creature's weight at the player's maximum weight at lift (that is, 30 * STR score (without modifier), in pounds) and develop a formula from the rest.
- Example: the creature weighs 125kg, the PC has a STR score of 16, that is, a lifting capacity of 480kg.
480 - 250 = 230, so the PC can throw the creature
230: 50 = 4.6 squares, that is, 4.6 * 5 feet = 23 feet. Rounded, it's 4 squares (obviously). Keep in mind that using this rule could allow your player to cast a halfling or creature of similar weight (~ 50 lbs). very very very far.
Again, note that the suggestions above are mine, which I have not tested in a real game. That's what I would consider reasonable – you would be the first tester (s) if you want it.
All accentuation and page references mine.